One Set Led Parking Sensor Auto Car Detector Parktronic Display Reverse Backup Radar Monitor System with 8Sensors ( 4 x 2.5m back sensors + 4 x 6m front sensors ) Features: Rate Voltage: 12V Operation Voltage range: 9-16V Rated Current: 20-200mA Detecting distance: 0-2.5m Ultrasonic Frequency: 40KHz Working Temperature: -30 - +70 Display working temperature: -20 - +60 7 colors sensord for option: White, Black, Silver,Red , Blue , Gold ,Grey Car parking sensor consists of ultrasonic sensors, digital control box, camera and LED/LCD/TFT display. The system detects the distance between the car and black obstrasonic sensors installed at the rear bumper of car. The distance and color will be showed in the LED dsiplay. With the change of alarm sound, detect the safe area correctly. Package including: 8 x Parking Sensors ( 4 x 2.5m back sensors + 4 x 6m front sensors ) 1 x Main Control Box 1 x LED Display Indication 1 x Hole Saw 1 x Power Cable 2 x Double Side Sticker 1 x User manual