... Way Motorcycle Alarm System with 6.2cm antenna ,learning code,433mhz, small motorbike alarm control box ,CE approved,waterproof main unit ... .Protect Voltage:250 Max VPP;3.Working Frequency:315mhz or 433mhz;4.Static Current:<3mA;5.Volume of Alerting= or >120dB ... : One Way motorcycle alarm with 300m remote distance!learning code,433mhz,back up battery anti cutting wire