Features: Patented products Real voice pronounce Reports the complete distance, so driver can hear the true distance Super thin LCD color display, wireless technology Movement imitation appearance (wheel rolling over), interaction alarm hint Only one stretching Forward identity system Set self-checking system, maintenance cost saving Follows the level of voice changing, regulates the volume Automatically opens the radar preventing bump when it enters reversing gear Technical parameters: Operating voltage: 12V DC (24V available) Operation current: 20mAh 200mAh Sensor installation height: 45 60cm Detection distance: 0.2 1.5m Ultrasonic frequency: 40kHz Operating temperature: -40°C +85°C Beep volume: 80 100dB (at 30cm distance) Outer packing: 10pcs/ctn Carton dimensions: 57 x 33 x 22cm G.W.: 9.1kg