Features: 1. Parking sensor system comes on automatically when reversing 2. More sensor colors available to satisfy full needs of consumers 3. Digital distance display of obstacles on screen 4. Real voice"be-be-be" alert to driver,three voice for different distances 2. Voltage: 12-16V DC 6. Working temperature: -30deg.C to +70deg.C 7. Detective range: 0.2m-1.5m 8. Operating frequency: 40 KHz 9. Packing: 1pc/color box/26.5*19.5*7cm