Hign-concerned Chemical:NoneTalk Range:0.3M-2.5MModel Name:FM078KZ8TType:InvisibleBrand Name:First SafeMaterial:ABSOrigin:Mainland ChinaCertification:CE,ULSensor system:8 PCS 22mm Sensor with 2.5m wirePower:DC-12Vsensor size:22mmSound:Can send out alarm BIBIColor:Black White Gray Blue Silver Red Champagne-goldBuzzer System Car Parktronic Multiple Radar Parking Sensor With 8 Sensors Reverse Backup Car Parking Radar Monitor Detector System Specification: 1. Rate Voltage: DC 12V 2. Operating Voltage Range: 9~16V 3. Rate Current: 20~200mA 4. Detecting distance: 0.3 - 2.5m 5. Ultrasonic Frequency: 40KHz 6. Working Temperature: -30~80C 7. Display Working Temperature: -20~60C Way of working: 1. When the vehicle is reversing, the rear radar automatically starts to work. 2. the end of the reversing, the radar in front of the car automatically opens, to detect, to prevent scratching, especially in the right front corner of the vehicle, 3. When the vehicle is not reversing, the brake is pressed, the front radar is turned on, and the work is stopped for about 10 seconds. Package: 1 x Main Control Box 1 x Buzzer 8 x Parking Sensors 4 x Extended line 1 x Power Cable 1 x Hole Saw 2 x Double Sided Adhesive Pad 1 x User manual