With this remote control kit you to easily add an additional garage door remote control or replace a missing or broken garage door opener without programming. Simply remove your existing garage door opener button and replace it with the Skylink Smartbutton. The easy two-wire installation means you can have the system up and running in less than 5 minutes simply by replacing your existing garage door opener button mounted on the wall. Mount the included soft-key back-lit keypad anywhere within 100 feet of your garage, and you'll be able to open your garage using your programmed 4-digit PIN. What's Included # Keypad transmitter # SmartButton # 2 3-volt batteries # Mounting hardware # 2 wire nuts # Instructions Maximum Transmission Security This kit features rolling code communication between the remote and smart button, which means that others won't be able to capture your code and control your garage door. Rolling codes constantly change, keeping your system secure. Additional Transmitters Available This universal garage door opening system is also available in a visor transmitter or keychain transmitter version.