ITEM NAME:4 Parking Sensors LED Display Car Rear Reverse Backup Radar Monitor System Alarm Product Description Description: 4 Sensors LED Display Car Parking Sensor Kit Auto Reverse Backup radar Monitor Detector System Universal Descriptions: The reversing radar is designed based on the principle that bats fly at high speed in the night without colliding with any obstacles. The probe is mounted on the rear bumper. According to different prices and brands, the probes are divided into two, three, four, six and eight, respectively. The probe radiates at a 45-degree angle and searches for the target up and down. Its biggest advantage is that it can explore obstacles that are lower than the bumper and the driver is difficult to see from the rear window, and alarm, such as flower beds, children playing in the back of the car. When the gear lever is engaged in the reverse gear, the reversing radar automatically starts working, and the ranging range is 0.3 to 2.5 meters, so it is very practical for the driver when parking. Specifications: Sensor color: Blue Supply voltage: 10.5~15V (12V nominal) Current consumption: 200 mA Max. Working temperature: 20~65Â °C Storage temperature: 35~85Â °C Diameter: 22mm/0.87" Obstacle detection: 150cm/59 inches from bumper (post dia. 80mm/3.15 inches) Reliability over time: satisfies the strictest automotive standards Technical parameters Detection distance: 0.3m/0.4m ~ 2.5m Alarm distance: 0.3m/0.4m ~ 1.5m Working frequency: 40kHz Working voltage: 12V DC Consumption current: 20-200mA Working temperature: -30~ +70 Â °C Alarm volume: 70 ~ 85dB (at 30cm) Maximum power: 2W IMPORTANT NOTICE: This device has been designed as a driver aid and must not be considered infallible. Always manoeuvre vehicles with caution and using common sense. Manoeuvre your car slowly in the interest of your own safety and that of others. Always stop the vehicle when the hazard warning is activated, in order to take in account movement inertia. Periodically perform functio.Always manoeuvre vehicles with caution and using common sense. Manoeuvre your car slowly in the interest of your own safety and that of others. The reversingradar is designed based on the principle that bats fly at high speed in the night without colliding with any obstacles.