Viper's 7142V 4-button remote control works with Viper's 350 Plus, Responder R350, and 4105V car security systems. With this remote, you can arm and disarm the alarm, lock and unlock the vehicle doors, and operate an auxiliary output (like a trunk release). It also includes a "panic" button. The blue LED on the remote confirms the commands you make for the alarm. Viper's Super Code Hopper™ technology changes code every time you use the remote, so thieves trying to steal your codes are out of luck.