I'm going to install a beeper in my car to warn people when the car is moving backwards. And I want to control the beeper by remote controller. Luckily I find a toggle remote control kit model of 0020001 (S1T-DC12 & C-1) from http://www.carymart.com that is quite suitable for me.
Wiring picture is as shown below:
Online shop: www.carymart.com