Each code transmitted by the remote is randomly different from the last code transmitted. This prevents unwanted copying of the remote signal and cloning of the remote itself.
 
Features
Transmitters are available with one to four buttons
Belt or visor clip supplied as standard – conveniently hang your keys from your belt or stowaway for quick accessibility in the car
Simple jumper-based learning system to facilitate the easy addition of new transmitters to the receiver
Remote belt clip doubles as wall mounting bracket – convenient Wall Switch for operating garage door motors, or for remote control of lighting, etc.
Weatherproof housing for receivers and remote controls
433MHz operating frequency