Review on Universal Switch Rocker for Driving with Enhanced JIANFA Functionality by Ryo Flora

Instructions and product information would be clearer in Chinese and I don't speak or write Chinese. My point of view: Very poor product information in the Revain ad. The switch comes with an internal LED that should illuminate when power is applied through the switch, but the switch does not include instructions on how to connect it. After some testing I found that the thin 3rd wire needs to be connected to the negative (common) wire and after the device for the switch to work. Otherwise 2 things will happen: The little red LED on the switch will never light up OR it will light up when the device is off. Beware. And if you want a courtesy light switch to signal when you're energizing something, I'd advise staying away from it, and especially until the supplier/salesperson on Revain is at least 2nd class skill. write in English.