This product make me for my motorcycle [url removed, login to view] our hand set Mobil to devise number first call my motorcycle is on and automatic cut my call. second call to device number my motorcycle is off and automatic receive my number. (when need motorcycle location just one sms. this is a tale com service).And when stale your motorcycle, device call to your hand set number. now this device is use for any cut ac/dc [url removed, login to view] device power supply is only 3.7 volt.