Product Description

Do You Need an Extra Accessory? 
Step 1
Use pliers to short the wall button terminals, if the garage door opens or closes, it works. Otherwise, please go to point 2.
Compatibility list is in the “Product guides and documents-User Guide” .
Accessory manual is in the “Product guides and documents-Instructions for Use (IFU)”

Step 2
If point 1 fails, your garage opener is from Chamberlain/LiftMaster/Craftsman. MSG100HK will still work(needs an extra accessory). Please claim the accessory on the meross web or send the support team the information for your garage opener and we will send you the appropriate accessory individually.
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.
For more installation information, please search for the video “meross MSG100”. If you meet any issue about our product, simply contact meross support team. Accessory manual manual is in the “Product guides and documents-Instructions for Use (IFU)” of the page.
Data Encryption
Meross has powerful data encryption functions to protect your information security.
Offline Control
When the internet is down, you can still control your devices in home network via Meross app.Close the door automatically when the door is still open after a particular time.
Auto Close
Close the door automatically when the door is still open after a particular time.
Package Contents :1 x Smart garage door opener, 1 x USB adapter, 1 x Door sensor with sensor wire, 4 x Screws, 1 x Test wire, 1 x Double-sided adhesive tapes,1 x User manual.
The Existing Wall Button and Existing Remote Control can still work, after you installed the meross garage door opener.
Installation Steps 
Step 1 – Compatibility Check
The product is compatible with more than 1600 models and 200 brands. Please follow the instructions to complete a simple compatibility test.

Step 2 – Connect the Phone
Connect your smartphone or tablet to a 2.4GHz network and ensure that your smart device is covered by a powerful network signal.

Step 3 – Install the Sensor
Please make sure the distance between the two sensors is less than 1 inch when the garage door is closed.

Step 4 – Deploy the Device
Install the wire from the sensor to the garage door opener. We recommend deploying the device on top of your existing garage door opener.

2.4GHz WiFi network support only: If you keep failing during the setup process and your router has both 2.4GHz and 5GHz WiFi, you may need to temporarily turn off 5GHz on your WiFi router and make sure your smart device is always covered by a strong 2.4GHz WiFi signal.
More Smart Devices from Meross
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Customer Reviews
4.3 out of 5 stars
11,328
4.3 out of 5 stars
11,328
4.3 out of 5 stars
11,328
4.3 out of 5 stars
11,328
4.3 out of 5 stars
192
4.3 out of 5 stars
159
4.3 out of 5 stars
4,107
Price
$49.99$49.99
—
$35.99$35.99
$69.99$69.99
$39.99$39.99
$79.99$79.99
$38.99$38.99
Number of Control Doors
1
Up to 3
1
Up to 3
NA
NA
NA
Works with Apple Home
YES
NO
NO
YES
YES
YES
YES
Works with Google Home
YES
YES
YES
YES
YES
YES
YES
Works with Alexa
YES
YES
YES
YES
YES
YES
YES
Works with SmartThings
YES
YES
YES
YES
YES
YES
YES
Control Method
App&Voice
App&Voice
App&Voice
YES
App&Voice
App&Voice
App&Voice
Remote Control: You can turn the garage door on/off from anywhere with internet access via the Meross app. To let in your family, guests, or couriers through the garage door while you are cooking or not at home. No monthly fee or any other subscription fee! Note: 2.4GHz network support only
Voice Control: You can control your devices hands free, just give voice commands to turn on/off the connected devices. Compatible with Apple HomeKit, Siri, Amazon Alexa, Google Assistant, and CarPlay. Please scroll down and check the “Product guides and documents – User Manual” for more product information
Compatibility Check: It is compatible with more than 200 brands. Please follow the instructions on this page to do a simple compatibility test or refer to our compatibility list”Product guides and documents-User Guide”. If your garage door needs accessories to solve compatibility issues. please send meross support team the information about your garage opener, we will send the right accessories for you individually
More Precise and Stable: It comes with a high sensitivity sensor that monitors the status of the garage door more accurately and the signal stays stable. And you can check the garage door open/ close operation records through the app. Stay alert by different notification modes such as garage door open/ close status, overtime notification, and overnight notification to remind you to close the garage door
Easy to Install: Installation is much easier than you may think. Please make sure your network strength is acceptable near your garage door. If you meet any issue about our product, simply contact meross support team. You can search for videos of “meross garage opener” or “meross MSG100” to learn more about features and installation instructions
T. Fenton –
Thin unit makes it easier to install in a crowded box
I have crowded boxes and still had room to install CopAlum connectors in the same box. Normally GFCI outlets are much thicker, but these are about the same depth as a high-quality non-GFCI outlet. Tested fine and look like normal GFCI on the outside.
T. Fenton –
J s –
Itâs got a green LED
It has a green LED that stays on unless this thing trips; useful when things go wrong, but might be annoying. Otherwise this is fine.Itâs very slightly less deep than the Eaton equivalent.
J s –
A Customer –
Fine quality modern looking GFCI sockets with the tamper resistent feature
These are fairly good value (I bough the 3 pack, white color) units to replace my old and rather worn out GFCI sockets in my kitchen as part of a facelift/remodel.These are sharp, modern and clean looking sockets but do not have a perfectly smooth finish but a slight textured surface which, if I had known, might have dissuaded my purchase as it might be a little more difficult to keep clean than a smooth finish. It may however mask small scratches and marks that a perfectly smooth fascia may otherwise show, so only time will tell.For my kitchen, I chose this tamper-resistant option as it may help to keep dust, debris and splashes out of the socket (that is not actually the purpose of tamper-resistant feature) and also helps give the socket a more uniform aesthetic look with less dark shadows in the rectangle prong holes.I like the subtle and unobtrusive indicator light, it’s not over bright and might be hard to see in full sunlight, but can assist in working out if the unit has tripped or not very quickly. I also like that the test and reset buttons are also white and thus blend in nicely compared to my older units that I’m replacing.Unlike many other negative reviews, I’ve had zero problems with the two units installed so far, the third one will be installed this weekend.These sockets are the standard GFCI size (depth), so if you are connecting to 12 gauge (or 10 gauge) house wiring, they are going to need more care and expertise to get them to sit neatly and perfectly flush within the smaller (depth) electrical boxes. Look for a lower profile GFCI socket if space within the electrical box and wiring size might be an issue.
A Customer –
J Engineer –
Fit small boxes. Use Greenies
The indoor, tamper resistant and weather resistant versions are the same physical size. So I’m going to post the same review for all. Photos are a mixture of the different versions and not necessarily representative of the product. See listing for actual.The slim design fits in the old, small metal boxes. Great for installing in an old house that was lacking GFCI.If feeding another outlet from the GFCI, it is a very tight fit to have 2 sets of wire in an old metal box (single size). I opted to replace the box with a new plastic one, since the garage was unfinished and easy to access. Might not be an option for everyone, so be aware when planning.At first I was a little frustrated that there is only room for a single ground wire to be connected to. Then I discovered Greenie wire nuts. Of course a pigtail works too, but takes up slightly more room and wire. While these GFCI are slim, they are still significantly larger than a standard outlet. Just what I’ve learned while installing these.I’ve only installed one weather resistant one so far (in a laundry room), but the green LED on it was far more dim than the indoor version. Seems backward, but maybe it was just a fluke.The tamper resistant versions works. When verifying with a multimeter after install, I had to insert both probes at the same time, otherwise the little flaps won’t open.The price here on Amazon is significantly less than the local hardware store. Another win.So far, I’m very satisfied with these. I went ahead and put one in each outlet even in locations that I could have used a regular one fed from an upstream GFCI. Did this for extra peace of mind, and so there is never any question which outlets are protected.These come with instructions and stickers to label other outlets. That would be really handy for some situations. Personally I didn’t want the look of the stickers in the house. Also, kids love stickers. The stickers might not have stayed in place. I plan to use them in the garage though.I like the clean white look, rather than the typical red and black buttons.The back of the outlet is labeled in English and Spanish. A wire strip gauge is also molded into the back. Really nice for the home handyman.One thing I really like about the weather resistant version better than the indoor is that the screws for the hot wire are black, and neutral are silver. Makes double checking your wiring easier. On the indoor ones, all screws are a brass color. Equipment Ground is green on both.I noticed that these require less bare wire than traditional outlets that you wrap the wire around the screw. This combined with the terminals being deeper into the box mean that you can usually cut off the old bent section of wire and strip a new clean section. Helps avoid breaking the wire due to bending fatigue.There’s also a little brass clip thing on the front of the indoor ones that the WR don’t have. It holds the bottom mounting screw in. Not sure what it is. Didn’t affect my application so haven’t looked it up.The load terminals are covered up with a warning label to help make sure the outlet gets installed correctly. Looks like Leviton thought of everything. Top notch quality product.
J Engineer –
David –
What it says it is at a great price
I think these may be some of the most economically priced GFCI’s I’ve seen. Can’t beat the price at my local big box.
David –
Dave D –
GFI Plug
Works perfectly. Protects from power surges.
Dave D –
Honuco –
Be aware of the green light. Came in a broken box.
Needed to update some CFGI outlets in my kitchen and decided on these. Bought the three pack as there was a significant cost savings by buying a multi-pack. The job was a simple remove and replace one and it went pretty smoothly. The wire connection is different from my old outlets, no need to create a hook to connect, you just insert the wire into the clamp and tighten. Love it, just be sure to insert the wire so that tightening the clamp draws the wire in. Outlet works fine the only difference from my old outlets is the power on? green light. Barely noticeable in the day, but very noticeable at night. Wife says it’s like a night light, but some people might not like it.My only quibble is with the box that housed the outlets. Couple of corners were smashed in and the bottom was ripped open. If I was at brick and mortar store I would not have bought this box but looked for a less damaged looking one. But I looked over the outlets and tested them, a bit of a pain, turn off circuit breaker, uninstall/install, reengage circuit breaker, test, turn off circuit breaker, then uninstall/install 2nd outlet, rinse and repeat for all three before permanently installing them. Not sure who is responsible for the crappy box situation, but they have to do better.So overall 5 stars and I removed 1 for the box. I was feeling generous with only a 1 star deduction as the final product turned out good. However if the same situation came up again, I’d just send the whole lot back.
Honuco –
Carbor Undium –
Es uno de los mejores tomacorrientes con GFCI con los que he trabajado. Su durabilidad en condiciones comerciales es muy amplia y sobre todo es muy seguro.Su activación en caso de falla a tierra es rapidÃsima, protegiendo en todo momento al operador del articulo eléctrico o aquel que ocasiono el corto a tierra.
Carbor Undium –
S –
Does what it is supposed to but very tight fit in the electrical box where the terminals can easily touch the sides and short.
S –
Brent –
These appear to be very good GCFI duplex receptacles. I like the colour coded status LED. Apparently GCFIs made before 2015 typically fail on whereas the newer ones are designed to fail off; this is reason enough to change out older GCFIs.
Brent –
OmG –
I’ve never seen switch, receptacles like Legrand, really great quality.
OmG –
Frontier Fabricators –
As described
Frontier Fabricators –