... 1. Learning code motorcycle alarm 2. waterproof main unit 3. sensitivity adjustable Hot Selling Two Way Motorcycle Alarm System ,learning code ... ,433mhz, small motorbike alarm control box ,CE approved,waterproof main unit,with back ... ;Motorcycle Alarm SystemTechnology Parameter:1.Input Voltage:9-15V;2.Protect Voltage:250 Max VPP;3.Working Frequency:315mhz ...