Generic LED Car Parking Sensors and Car Reverse Radar System, 4 Sensors, Blue/Black/Red

Specifications: General Detecting Distance: 0 - 2.5m Ultrasonic Frequency: 40 KHz Sensor Self-Check Function System Alarm Working Temperature: -40 - 80 Degree Celsius Display Working Temperature: -20 - 60 Degrees us Power Source: Car Battery Rated Current: 20 - 200mA Rated Voltage: 12VOperation - 16V