LY-818 Features:1.Digital display indicating distance between car and obstacles.2.2-side, 3-color digital indicator 3.Buzzer ON & OFF function4.3-stage beeping mode indicating different distance5.voice reminder((optional) Technical Data:Voltage: 12V Working Voltage Range: 10.5V ~ 16V DCCurrent; 50mA ~ 180mARange of Detection: 0.2 ~ 1.5 m Temperature for CPC: -40 ~ +80oCTemperature for Display: -30 ~ +70oC