Interesting little light switch. Installed one in the basement and it works fine.
https://images-na.ssl-images-amazon....L._SL1000_.jpg
Wireless Light Switch Kit ($29.99)
https://www.ebay.com/itm/142417403378 ($9.85)
I added some 4 foot LED light strips above my lathe and the dryer (in the basement).
Then I realized that my wife couldn't hardly reach the light switch.
Since I normally use the over-head switch, I wired the relay puck across (parallel) the Off-On switch..
Red Input to the hot side (black wire), Red output wire to the load side of the switch.
Put both the blue wires to 'N' in the box.. So I could use either switch.
Then hung the remote (battery-less) switch control, so my wife could easily reach it..
The Relay puck has a small off-on button that is also the 'Learn' button, for setting up the remote transmitter..
The max 433 MHz range is unknown, but it works fine from anywhere inside the house.
What I didn't like was the lack of Broadlink RM Pro compatibility.
No way to control it with my smart-home stuff..