Top positive review
Works fine if you understand how to wire it correctly.
Reviewed in the United States on February 18, 2022
This was my first encounter with a 3-way switch and I struggled with the simplicity of it. There is one black screw, which goes to, either the hot side of the supply line, or the hot side of the lamp connection.
This smart switch must replace the load side 3-way switch. With a meter or voltage tester, you can figure which unit is which by flipping the switch up and down..
The other two wires on a standard 3-way switch apparently have no markings. This was a new thing to me. One of the two "travelers" was black and the other was red.
Everyone keeps saying that you need a "neutral in the box" but no one mentions that you also need a hot wire in the box, as well. I simply went to the LINE side switch and moved the black TRAVELER to the black COMMON screw. This supplies power to the other switch, so that the Amazon switch LINE wire connects to the black wire that used to be a traveler on the LOAD side switch. The red TRAVELER wire goes to the brown TRAVELER wire on the Amazon switch. And, of course the former COMMON wire goes to the LOAD wire on the Amazon switch.
I tried using the bar code to set it up, but it didn't work at all. However, my Android phone app found the switch and it was up and running in good time.
It is interesting that, when I flip the traditional 3-way switch, I hear the relay in the Amazon switch activate, so that is where the action is. Of course, I generally don't use the physical switch any more, since the voice command works.
I've read several reviews from folks who say it wouldn't work. I was quite determined and found the solution before the return period expired.
This didn't come at all easy, but now I feel I have a much better understanding of something I should have learned 40-some years ago in my high school shop class.
Now that Amazon has included the schematic on this product page, it surely will be much easier for most purchasers to figure it out. I wasn't able to make out the fine distinctions in the tiny drawings that were provided in the box.