Features: 1) Automatically starts 2) Bionic detecting-head design to measure accurately, quality guarantee 3) Available for 2-4 sensors of embed or adhesive, many colors 4) Many camcorder models for selection 5) Displays the obstacle behind the car on the front mirror 6) Indicating different distance and direction separately by voice (voice box or buzzer ) Specifications: 1) Working voltage: DC12 2) Max. power: <5W 3) Working temperature: -20 ~ 50oC 4) Display distance: ≤1.8m 5) Alarm distance: ≤1.5m 6) Alarm loudness: ≥50dB Outer packing: 10pcs/ctn Carton dimensions: 34 x 21.5 x 39.5cm