Features: 1. Blue background LCD display 2. 3-stage beeping mode indicating different distance 3. Car-shaped icon on the LCD indicating precise state of your parking process 4. Easy installation on any kinds of vehicle. 5. voice reminder(optional) Technical Data: Operating voltage: DC 9-15V Static current: 40mA Maximum Power: 4W(Max) Farthest distance: 1.5m Siren sounds distance: 0.1-1.2m Siren volume: 85-105dB Operating temperature : -40℃-80℃