3 Way Smart Dimmer Switch by Martin Jerry | Touch Trailing Edge 4 Way Smart Dimmer Switch, SmartLife App, Compatible with Alexa as WiFi Light Switch Dimmer, Works with Google Home

Great customer service but incompatible with my low voltage LED lights
The bottom line is that if your lights are standard 120V, this is a nice product that is reasonably priced and offers dimming in a 3-way switch that is hard to find. If you have low voltage lights with a driver/transformer that you want to connect with this switch, there may be a compatibility issue.I purchased 9 of these 3 way / 4 way dimmer switches to replace existing non-smart switches that were otherwise working fine. 6 of them replaced the main switch for low voltage (11V) high hat LED lights that each included their own driver/transformer. 3 replaced the main switch for standard 120V LED high hats. This was all performed by a licensed electrician. All 6 of the Martin Jerry 3-way dimmable switches connected to the low voltage lights failed, first with transient flickering of the light, then with no response and, in retrospect, burning out of the switch (although without any burning smell) as they no longer responded. The other 3 switches controlling 120V LED high hats worked fine.I contacted Martin Jerry and it was initially suggested that I try increasing the minimal dimming of the switch via the dial on the bottom of the switch. I tried this on the one attached to low voltage lights that hadn’t yet stopped responding and it more obviously burned out the switch, with visible smoke and burning smell. A bit scary since my electrician wasn’t there at the time, but I turned off the circuit breaker (the lights stayed on prior to that even with the burned out switch) until my electrician was available.I contacted Martin Jerry again and a FaceTime call was arranged when my electrician could be present. Simon, the Martin Jerry engineer (based in China) reviewed the wiring that had been done and found it to be correct. A new Martin Jerry switch was installed with Simon watching via FaceTime and it promptly burned out as well after briefly going on.Simon agreed that it appeared to be an incompatibility with the driver / transformer for the low voltage lights since the other 3 identical switches continue to work fine with 120V LED lights. He even suggested that I write a review (my first on Amazon) to warn others of this possible problem. Granted, it might be manufacturer specific with the lights themselves. The incompatible lights were from ELITELIGHTING V&F TRANSFORMER CORP , MODEL J5P65, 75VA Copper with load 11.0V, 75VA and are about 9 years old, so it is possible that this incompatibility issue has been resolved with newer models.Simon made sure that I was refunded for all 6 switches that no longer worked even though I had purchased them more than a month previously and they did not technically qualify for a refund through Amazon, so that was much appreciated. The 3 switches that I kept continue to work fine with 120V lighting. On the other hand, the incompatibility of the these switches with my low voltage lights was a major hassle for which I incurred additional electrician expenses and wasted time.

Did not work for dimmable LED lights
I spent a lot of time researching which dimmer will work with LED dimmable lights and thought this was the right choice. It was not. The LED lights just flicker on and off. I confirmed that the LED lights are dimmable with other controllers, but not this one. Incandescent bulbs dimmed fine.2 hours wasted trying to figure what was wrong.

Best solution for 4-way (3 light switches)
I bought a dozen GE smart switches (since they were cheap). But i had a few light switches that are 4-way switches (3 light switches to control one light). Few of the smart switches will work for 4-way switches, but this one did. The wiring was one of the easiest I tried (and I tried a lot). The light turns on and off quickly, the dimmer slider is easy to use and accurate, there is no flicker in the lights, and the lights connected easily to the app (once i turned off the 5Ghz network). I would highly recommend. The only negative is the price. These are very expensive. If the price was lower I would have used these everywhere instead of just on my 4-way switches.

Works…until it doesn’t.
I ordered this as a lightning deal in January 2021. Tonight, Oct 26th 2021 it died. Turned the lights off by itself after flickering for a bit. I attempted to turn the switch back on but each time the lights would come on and the switch would flash a red light and go back off. I then tried to drop the dim down to only 20-30% and turn the switch on again. This time it stayed on until I raised the dim level to 100%. The switch turned off the lights and no LEDs have came on since. Look elsewhere, cheaply made, not reliable.