Car parking sensor system Features: Integration of rear view display, barrier distance and voice alarm High-sensitivity ultrasonic detector Real-time digital direction and distance display on screen Intellectual step-by-step voice-directed alarm system Compatible with any types of monitors and backup cameras Ensures safer backing and parking PARKING SENSORS SPECIFICATIONS Number Of Sensors: 4 PCS Color Of Sensors: Optional Ultrasonic Frequency: 40KHz Detecting Distance: 0.30 2.50m (1ft 0in --- 8ft 4in) Best Detecting Distance: 0.30 1.50m (1ft 0in --- 5ft 0in) Display Unit: M Or FT Optional Power Supply: DC10-18V Operating Temperature: -20 70 RH95% Max Storage Temperature: -40 80 RH95% Max