Find top-rated Pros in your area

Enter a zip code and get matched to businesses near you.

D&D Electrical Services

Electrical, Lighting, Landscaping - Lighting,

About us

At D&D Electrical Services Inc. customer satisfaction is our #1 goal and we will do anything to fulfill it. The owner of the company, the license holder, will be present and involved in the project in all stages from the first phone call until the work is done to customer satisfaction. We offer Courteous service and Quick response 24/7 Reliability: D&D will always offer the customer a very simple and cheap solution for your power/electrical problem. A high-level of professional expertise – the owner/license holder will always be present in every job at every stage of the work starting bid until the work is finalized by the city inspector ( when a permit is required). No salesman. No subcontracts. Insurance – D&D electrical services holds all insurances required by law. Warranty – D&D electrical services provide a 2-year warranty on all work and material provided by us.

Business highlights

16 years of trusted experience
Emergency Services Offered

Services we offer

Panel, troubleshooting specialist, ceiling fan, outlets & switches, solar system, bathroom fans, lights, exit lights, patio & yard lights, track lights, rewiring, low voltage lighting & fluorescent lights, smoke detectors.

Amenities

Free Estimates
Yes
Warranties
Yes
Emergency Services
Yes


Accepted payment methods

American Express
Check
Discover
MasterCard
Visa

Photos of past projects

Reviews

5.0264 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
97%
4
1%
3
0%
2
0%
1
2%


Rating CategoryRating out of 5
quality
5.0
value
4.9
professionalism
5.0
responsiveness
5.0
punctuality
5.0
Showing 201-225 of 264 reviews

Brian E.
03/2011
5.0
electrician
  + -1 more
D&D Electrical Services did a really good job and I like the fact that the owner was there working hands on with his company.
Description of Work: D&D Electrical Services did some outdoor electrical work at my house. They ran a couple of new lines and installed some fixtures.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,200

Eric R.
03/2011
5.0
electrician
  + -1 more
I had another electrician come by and give me an estimate to re-route the wire. His estimate was $165. When Doron (from D&D) came, he checked a couple outlets (the other person didn't) just to verify what he was up against. We talked about a couple options to get the job done. One approach he offered was the same as the first contractor. I liked this approach since it was the most straightforward. Doron said he could do it that way no problem but he wanted me to be aware he would need to punch several holes into the wall to fish the wire. Since I needed some wall work done anyway, I said ok, let's assume we go that way. His quote was exactly the same as the prior (also licensed) guy, $165. Two hours later the job was done as expected, everything was tested, and I even asked for my Angie's List discount which we agreed on $150 as fair. He even replaced an electrical outlet that was suspect at no extra cost. Doron worked very hard, cared about his work, and had a strong "get it done" attitude. He is now my new electrician! BTW, his estimate was done at 5:15PM and he walked out my door at 7:15PM with job finished without trying to hit me up for overtime.
Description of Work: Needed to have a wire (romex) in the wall moved since I was putting an access door into the wall and found a wire right where the door was going to be.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$150

Adam H.
03/2011
5.0
electrician
  + -1 more
Things went as smoothly as they could have. I liked that fact that they didn't start the job and then take days off for weekends and holidays which would have left me without power during this time. His crew were polite and fully cleaned up before leaving. I would use them again.
Description of Work: I purchased a house that was built in 1947 and it still had all the original wiring running though out. I called Doron to come over and replace all of the wiring including all of the plugs and switches. Him and his team showed up the next day and worked for the next week straight though including the holidays. He even recommended a guy to come patch up the dozens of holes that had to be made in the walls. When the inspector came out Doron showed up and walked through the house with him to make sure everything was up to code.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$9,000

Amy S.
03/2011
5.0
electrician
  + -1 more
Doron was straight forward from start to end. Gave options for what my preferences were. Cares about his work and does excellent job.
Description of Work: Hooked up dryer outlet, switched three outlets to GFCI, put in new outlet in bedroom, added switch for outside light.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$550

Dan K.
03/2011
5.0
electrician
  + -1 more
Doron was very good about coming out on short notice and diagnosing the problems. He also definitely cares about doing good work and a professional job, and he did both for me. He is very knowledgeable about electrical systems as well as municipal codes, explains the problems and what needs to be done, and can give you some options as to what will work best for your situation. I would definitely recommend him.
Description of Work: Doron from D&D Electrical Services replaced and upgraded my entire electrical service panel and replaced some faulty electrical conduit and wiring going inside the house.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$2,800

JOHN R.
02/2011
5.0
electrician, lighting
  + 0 more
Called Doron at approx. 12:00pm. on Feb 2nd. 2011. discussed the above work. Doron told me that he would come and see the job between 1 to 2-1/2 hours from when I called. Doron arrived just after 2:00pm and thoroughly checked what needed to be done. Doron gave me a quote on the spot and told me that if I was satisfied with the price he could do the job immediately. I agreed. Approximately 1-1/2 hours later I had a working motion sensor light. Doron went as far as painting the J-box the same color as my stucco. Great experience would definately invite him back to do some future work. Great job Doron.
Description of Work: Install circuit, J-box and motion sensor light on the east exterior gable of the house.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$189

BOBBY E.
02/2011
5.0
electrician
  + -1 more
Overall I am very pleased with D&D Electrical Services Inc. Doran Garby was proffessional and curtious , found the problem and promptly corrected the issue. I would use and recommend this company for sure.
Description of Work: Found and fixed short in wall outlet

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$220

Barbara R.
01/2011
5.0
electrician
  + -1 more
Very great service, Doran was a pleasure to deal with. Will definitely be using D&D again for all my electrical needs.
Description of Work: Very great service, Doran was a pleasure to deal with. Will definitely be using D&D again for all my electrical needs.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$150

Jacquelyn K.
12/2010
5.0
electrician
  + -1 more
Doron was professional and knowledgable. He personally made sure the job was done right!
Description of Work: The crew replaced my entire electrical system, including upgrading kitchen in prep for a remodel.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$6,500

JEAN G.
12/2010
5.0
electrician
  + -1 more
Doron took care of the permit and was there when the inspector passed it. Our old house has many quirks which complicated things, but Doron took everything in his stride. He honored his quote despite this taking longer than he had anticipated. We have done work on every house we ever owned, but I have never seen anyone more determined to make his customers happy than Doron. We recommend him completely.
Description of Work: We needed a new circuit for a double oven. We have an old house. It turned out that our service had to be upgraded to run more circuits off.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$3,700

Stephen H.
12/2010
5.0
electrician
  + -1 more
Doran did a great job. This was a small job for a professional electrician, just install an outlet. But he treated the job and my home with great respect. The work was performed in a thoroughly professional manner and took less time than expected. He gave me a very fair price. I am very satisfied with D&D Electric and would use Doran Garby for an electric job, large or small.
Description of Work: I needed an electric outlet installed in our foyer.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$125

Marianne R.
12/2010
5.0
electrician, lighting
  + 0 more
I had a very good experience with Doran. He is professional, honest and easy to work with. He is very knowledgeable and experienced and even helped me by pointing out how some electrical work was not done correctly by a previous contractor and how I should go about resolving and correcting it with them. I was extremely happy with the outdoor lighting he installed - and both of our yards look beautiful. (I now leave the curtains open at night because I like to admire the beautiful and dramatic new lighting!) Also - because he was working on outdoor lighting that you couldn't really see until after dark - he arranged to come back to the house at night after I got home from work - so he could walk through the yard with me and make sure I liked positioning of each light. He didn't leave until I was happy with everything and also impressive - he refused to accept a dime until he knew I was completely satisfied with the final job. I highly recommend Doran for any job large or small - you will not be disappointed.
Description of Work: Repaired previously installed outdoor Malibu lighting. Also installed extensive new outdoor accent lighting, including uplighting a giant 80 ft. spruce tree, banana trees and hedges in front and back yards.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$5,000

Anne O.
12/2010
5.0
electrician, lighting
  + 0 more
Some of the work performed was on D&D's recommendation and beyond my original scope of work. Doron was conscientious about his work and the safety of my home as I prepared it for rental. Work was performed as discussed, on time and without any mess. A pleasure doing business with him.
Description of Work: Repaired dislocated receptacles, replaced smoke alarms throughout, removed and replaced old light fixture from 2-story stairwell, installed new GFI receptacle.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$375

Dana P.
12/2010
5.0
electrician
  + -1 more
The work was great from start to finish. He started when he said he would and ended when he said he would. He is dependable and professional. I highly recommend D&D Electrical Services.
Description of Work: Doran provided outdoor electrical services. He put our wires connected to our house and garage underground, and did electrical work in our garage.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$800

Response from D&D Electrical Services
Dear Member, Thank You for your positive feedback. We truly appreciate your business, and we're grateful for the trust you've placed in us. Please don't hesitate to call me if ever a problem should arise. We hope to have the pleasure of doing business with you for many years to come. Wishing you and your family all the best during the holiday season and a joyful, healthy and prosperous 2011!! Sincerely, D&D Electrical Services, INC.

SANDRA W.
11/2010
5.0
electrician
  + -1 more
It went very well. I sent D&D an email from Angie's List and heard from Doron a little while later. He came out within the hour. He was very careful and thorough. He brought tools to check whether power was going to the transformer, and found that it wasn't. He diagnosed the problem, fixed it, and checked to be sure the lights were working properly. He had a motion-sensor light on his truck, and was able to install it the same day. He reminded me that he gives a $50 coupon discount to Angie's List members, and applied the discount to my bill. All in all, a very good experience.
Description of Work: Fixed the low-voltage transformer that controls my back yard lighting; furnished and installed a motion-sensor light with new water-proof box and new electrical line.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$240

Response from D&D Electrical Services
Dear Member, Thank You for your positive feedback. We truly appreciate your business, and we're grateful for the trust you've placed in us. Please don't hesitate to call me if ever a problem should arise. We hope to have the pleasure of doing business with you for many years to come. Wishing you and your family all the best during the holiday season and a joyful, healthy and prosperous 2011!! Sincerely, D&D Electrical Services, INC.

David F.
11/2010
5.0
electrician
  + -1 more
He was punctual, polite, informative, and very generous with his time. I would definitely use him again.
Description of Work: After a space heater started smoking in the bathroom and stopped working, the electrical outlet no longer worked. We checked the circuit breakers and couldn't find a problem so called Doran. He came over within an hour of the call, checked the outlet and found that the circuit breaker had been shut down. He reset it and never charged me for the service.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Response from D&D Electrical Services
Dear Member, Thank You for your positive feedback. We truly appreciate your business, and we're grateful for the trust you've placed in us. Please don't hesitate to call me if ever a problem should arise. We hope to have the pleasure of doing business with you for many years to come. Wishing you and your family all the best during the holiday season and a joyful, healthy and prosperous 2011!! Sincerely, D&D Electrical Services, INC.

Mary Irene P.
11/2010
5.0
electrician
  + -1 more
I called Doron to request an estimate through the phone. Since the job I had can be easily discussed through the phone, he gave me an estimate without going to my house. He scheduled this job at 7am to accommodate my work schedule. He replaced the 2 outdoor light fixtures, and charged the exact amount he estimated on the phone. He was very helpful during this whole process, and did not attempt to sell anything even though I asked for a few more estimates when he was at my home. All the estimates he gave are very reasonable. Until now (2-3 weeks after), the lights Doron installed are still working perfectly.
Description of Work: Replaced 2 outdoor light fixtures.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$165

Response from D&D Electrical Services
Dear Member, Thank You for your positive feedback. We truly appreciate your business, and we're grateful for the trust you've placed in us. Please don't hesitate to call me if ever a problem should arise. We hope to have the pleasure of doing business with you for many years to come. Wishing you and your family all the best during the holiday season and a joyful, healthy and prosperous 2011!! Sincerely, D&D Electrical Services, INC.

John M.
10/2010
5.0
electrician
  + -1 more
Doron was a professional through the entire project. Starting with the estimate through several of the changes that came up, through final inspection. Additionally, he gave good advice on how the project could be improved over what I had orignally laid out. I have no reservations in recommending him to my friends nor will I hesitate to call on him again.
Description of Work: I am installing an outdoor kitchen and D&D electrical installed a sub-panel ran all the circuits for the lighting (overhead, countertop, landscaping), fire pit, BBQ, warming drawer, GFI, undercabinet, fridge, icemaker, and water heater.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$3,000

Crystal C.
09/2010
5.0
electrician
  + -1 more
Look no further than D&D if you need electrical work. You get a precise estimate, a careful effort to keep from messing up your walls whether you need the work done outside (he did our front porch, back yard patio and garage) or inside. Doron Garby, one of the owners, executes everything he does with great professionalism. His service is prompt and at the time promised, and he stays until he gets the work done...even as the sun goes down around him! He makes himself completely availability to discuss any issues...in English. And he's a nice family man, too! Never fear the inspector coming; if for any reason the inspector has an issue (which probably will never happen, unless the inspector finds something in your house having NOTHING to do with the work Doron did...long story...but Doron will fix THAT, too!) We were very happy with the standard of work, price, promptness, tidiness and information D&D provided. This guy's the best!
Description of Work: Added properly wired GFI (ground fault circuit interrupters) sockets and fixed improperly wired ones done by another electrician, on my porch, front of the house, patio and garage. He also voluntarily fixed a non-working socket he found inside the house for no charge. He worked late, was polite and quick.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$700

Christopher G.
09/2010
5.0
electrician
  + -1 more
My wife called Doron on Friday, and he promptly met us on Saturday morning. He provided a detailed, accurate estimate, then immediately got to work on our fairly large project. Everything was done by the middle of the week. He is honest, professional, and incredibly hard-working. We'd hire him again in a heartbeat.
Description of Work: Installation of recessed standard and fluorescent lights in entryway, bedrooms, bathrooms; fans in bedroom/bathroom, track lighting in living room, light fixtures in dining room and bathroom, updating and adding of outlets and jacks throughout house.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$8,000

martin D.
09/2010
5.0
electrician
  + -1 more
first they responder immediately. doran is very proffesional and knows exactly what to do.I cant tell you how please I was with his work and performance. this is a company a highly reccomend
Description of Work: fixed buzzing recessed lights. fixed outdood patio lights and installed a timer.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$700

Faith L.
09/2010
5.0
electrician
  + -1 more
Doron showed up on time each day and not only was professional, but quick, competent and cleaned up after his work and expedited the inspections necessary to complete the jobs. Very knowledgable, efficient and very honest. Was honest about having to add new circuits to upgraded electrical panel in order to resolve problems. (Other electricians didn't mention that important detail.) Very easy to work with, great communication skills, polite and first rate professional. Pricing reasonable. Highy recommend!!
Description of Work: Upgraded electrical panel; installed motion detectors; ran new circuits, installed gfi outlets, replaced electrical outlets.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$3,800

James M.
08/2010
5.0
electrician
  + -1 more
I was going to have my so-called handyman take care of it, but after he looked at the scale of the task, he made up a lame excuse why he couldn't do it. This was the same guy who wanted to charge me $350 for just the fan when I was able to buy it from Amazon for $200. So I called about 5-6 different companies and had 3-4 provided on-site quotes and a couple of unseen phone quotes. My bathroom is approximately 50' from the panel and I was told I needed a new circuit(?) because of the heating element of the unit. The quotes ranged as high as $900 and D&D's was the lowest at $350, with rest of the quotes at around $500. However, Doron was also the only one who said he needed to punch a hole above the panel because there wasn't access. 2 other companies said a hole wasn't necessary, but they actually went into the attic. I was skeptical of D&D because of the low offer and the damage to my exterior, but I wasn't keen on spending more than I needed to and so I asked Doron why he needed to punch a hole in the wall when others said it wasn't necessary. He said he should have checked the attic and said he could do the job without punching a hole above the panel. I was still a little wary, but Doron assured his work would be topnotch and his price the lowest because he was the actual person doing the work and not an employee of a company. I thought about it for a couple of days and then gave Doron the greenlight. Doron arrived on time and the installation took a couple of hours longer than he anticipated, but he had to spend a lot of time cutting a hole in the ceiling, climbing in and out the attic, and finishing the wiring. It's been about 3 weeks since the installation date and the unit works great. I would've gladly rated Doron A's in all areas except he tried to sell us an attic fan after he was finished. It was sort of a hard sell and I could've done without it.
Description of Work: Installation of a vent/heater in a bathroom.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
4.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$350

Robin M.
08/2010
5.0
ceiling fans, electrician, lighting
  + 1 more
It went very smoothly. He spotted old electrical outlets that were installed incorrectly with improper/dangerous outdoor wiring and he corrected it and made it up to code. He had no problem installing the heavy outdoor ceiling fan and did it quickly and efficiently. I would hire Mr. Garby in a minute for other electrical work in my house.
Description of Work: Mr. Garby installed a ceiling fan in our outdoor patio, including electrical outlet. He also found other outdoor electrical outlets with sub-standard wiring and fixed it.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$250

Peter P.
08/2010
5.0
ceiling fans, electrician
  + 0 more
Electrician arrived right on time. He listened as I explained how we wanted to run electricity to and control a new ceiling fan. He suggested a couple money saving methods, such as using a remote control instead of the wall switch. This would involve less drywall/ceiling damage, however I decided on the wall switch anyway. Before starting, he clearly explained what would be cut open and how the wiring job would be done. He did the work exactly as we wanted, making small square cut holes in the drywall to route the wiring. He used plastic drop cloths everywhere and worked right though until finished. He also installed the electrical box & brace designed to hold a ceiling fan. Even though he offered to assemble the fan for me, I wanted to do that part myself. So he clearly showed me how to hook up the last wires for the fan motor. He made sure to clean up the area when done. I payed him on completion and received an emailed invoice receipt a few days later stating work done and payment. I am doing the drywall repairs myself. When I assembled and mounted the fan, it worked flawlessly.
Description of Work: Need an electrical line run from a wall switch to the center of the ceiling for a fan installation. Difficult situation as it would involve running a new electrical line through 2x12 joists. This was beyond my skills and tools. In emails to their company, they provided advice on the sort of fan-speed control that would work for our new ceiling fan.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$200

Response from D&D Electrical Services
Dear Member, Thank You for your positive feedback. We truly appreciate your business, and we're grateful for the trust you've placed in us. Please don't hesitate to call me if ever a problem should arise. We hope to have the pleasure of doing business with you for many years to come. Sincerely, D&D Electrical Services, INC.

Contact information

22137 Hart St, Canoga Park, CA 91303

http://www.rewirepro.com

Service hours

Sunday:
7:00 AM - 8:00 PM
Monday:
7:00 AM - 8:00 PM
Tuesday:
7:00 AM - 8:00 PM
Wednesday:
7:00 AM - 8:00 PM
Thursday:
7:00 AM - 8:00 PM
Friday:
7:00 AM - 8:00 PM
Saturday:
7:00 AM - 8:00 PM

Licensing

Bonded

Insured

Licensed*

Trade License Number
937760
Trade License Locale
California
Trade License Authority
California: Contractors
Trade License Expiration
09/30/2025
State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.

*Contact business to see additional licenses.


Service Categories

Electrical,
Lighting,
Landscaping - Lighting,
Home inspection

FAQ

D&D Electrical Services is currently rated 5 overall out of 5.

Sunday: 7:00 AM - 8:00 PM

Monday: 7:00 AM - 8:00 PM

Tuesday: 7:00 AM - 8:00 PM

Wednesday: 7:00 AM - 8:00 PM

Thursday: 7:00 AM - 8:00 PM

Friday: 7:00 AM - 8:00 PM

Saturday: 7:00 AM - 8:00 PM

D&D Electrical Services accepts the following forms of payment: American Express,Check,Discover,MasterCard,Visa
Yes, D&D Electrical Services offers free project estimates.
No, D&D Electrical Services does not offer eco-friendly accreditations.
No, D&D Electrical Services does not offer a senior discount.
Yes, D&D Electrical Services offers emergency services.
Yes, D&D Electrical Services offers warranties.
D&D Electrical Services offers the following services: Panel, troubleshooting specialist, ceiling fan, outlets & switches, solar system, bathroom fans, lights, exit lights, patio & yard lights, track lights, rewiring, low voltage lighting & fluorescent lights, smoke detectors.

Contact information

22137 Hart St, Canoga Park, CA 91303

http://www.rewirepro.com

Service hours

Sunday:
7:00 AM - 8:00 PM
Monday:
7:00 AM - 8:00 PM
Tuesday:
7:00 AM - 8:00 PM
Wednesday:
7:00 AM - 8:00 PM
Thursday:
7:00 AM - 8:00 PM
Friday:
7:00 AM - 8:00 PM
Saturday:
7:00 AM - 8:00 PM