Wireless Remote Control Relay Switch, 433MHZ 12V Waterproof Transmitter Toggle Switch RF Relay (1 Transmitter & 1 Receiver) DC3.7V 4.5V 5V 6V 7.4V 9V 12V

I'm using this as a remote control for a halloween display. Push the button and a clown lunges out at you. It works very well for that.The paper instructions that come with it leave a lot to be desired. The pictures on the product page here on Amazon.com are all you need. In particular, if you want momentary on/off mode, you need to add a small jumper to the back of the board. And I mean small. I used a single strand for stranded wire and a powerful magnifier. The jumper is about 1mm long! Look at the picture on the product page here. It's much clearer than the printed instructions.The default mode (no jumper) is click on, click off.The momentary mode is press on, release off.

The switch is great. I have used one in a similar application before. This time is was different and I could not work past Amazon in getting my email address to the manufacturer so they could send me a detailed diagram on exactly where to modify the switch to make it momentary. The switch is still sitting on my desk.

Power cords to wireless relay melted as soon as power was applied.