we offer resersing sensors with high quality: LY-828-4 1. Digital display indicating distance between car and obstacles. 2.2-side, 3-color digital indicator 3.3-stage beeping mode indicating different distance 4. voice reminder(optional) Technical Data: Voltage: 12V Working Voltage Range: 10.5V ~ 16V DC Current; 50mA ~ 180mA Range of Detection: 0.2 ~ 1.5 m Temperature for CPU: -40 ~ +80oC Temperature for Display: -20 ~ +70oC