This controller has put the program of alarm inside the controller, don't need to install a separate alarm system.Features: 1) Rated voltage: 36V/48V 2) Rated power: 350W/500W 3) Applicable model: electric bicycle and motorcycle 4) Remote arming / disarming5) Remote choke / flameout6) Remotely locates the motorcycle by audio and photic alarms7) Remote sensitivity adjustment8) Emergency lock / engine lock