XiXi Shop Reversing radar is made of premium quality components and circuitry to ensure system overheating and overloading, ensuring durability and longevity car reversing sensor is equipped with 4 ultrasonic sensors with dual CPU and advanced chipset for improved coverage and detection (0CM-2.5M). Can detect small children and low walls, avoid dangerous collisions around the moving vehicle The horn sounds at different frequencies depending on the vehicle's distance from an object. The closer the obstacles, the louder and faster the sound alert, which increases the safety of passengers and pedestrians around the moving vehicle Easy installation, mount the sensors on your car at the hole saw and connect the 4 sensors to the corresponding ABCD socket of the main control box. Product Description Safety parking is very important for a driver as we know, have you encountered such problems when parking? You can see everything in the rear view camera, but it's too far from you for real? Can't detect small child when approaching or can see clearly behind? Then stop these danger behaviors, come join with parking sensors which provides you with safety parking! Easy Installation Using the hole saw tools, just drill holes on the bumper. -shocks cars to install the 4 parking sensors and make sure it is stable Specification: Frost and rain protection Rated current: 20-200mA Power input : 9-16V DC Working temperature: -30C - + 70C alarm voice: 80dB Ultrasound frequency: 40KHz Sensor detection range: 0cm - 2.5 m Package Included: 1 x main control box 1 x buzzer 4 x parking sensors with 2.5m cable 1 x power cable > 1 x hole saw 2 x double-sided adhesive pad 1 x user manual 4 PCS Ultrasonic Sensors Ultrasonic sensors with superior performance, accurate detection and coverage. Capes tors will buzz to alarm you in 3 modes according to obstacle distances (0-2.5M)