Reversing radar is made of premium 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 distance of the vehicle to an object. The closer the obstacles, the louder and faster the audible alert, which increases the safety of passengers and pedestrians around the moving vehicle Easy installation, mount the sensors on your car using the hole saw and connect the 4 sensors to the corresponding ABCD socket of the main control box. Product Safe 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 is it too far away from you in real life? Can't detect small child coming close or can see clearly behind? Then stop these dangerous behaviors, come join with parking sensors that provides you with safe parking! Easy Installation Using the hole saw tools, just drill holes on the car bumpers 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: -30 C - + 70 C Bibi alarm voice: 80dB Ultrasound frequency: 40KHz Sensor detection range: 0cm - 2.5m Package Included: 1 x main control box 1 x buzzer 4 x parking sensors with 2.5 m 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. The sensors will buzz to alarm you in 3 modes depending on obstacle distances (0-2.5M) Anti-freeze and waterproof material for a lifetimeDual CPU Dual CPU chipset system with protection circuits preventing overheating or overloading, No radio interference from other wireless devices and responding quickly All you have to do is easily connect the 4 ABCD sensors to the corresponding ABCD socket Alarm Speaker Aolead Parking Sensors with an alarm speaker up to 80db that will let you hear clearly when obstacles are approaching, the louder the alarm, the closer the obstacles are. Just attach the speaker to the windshield or dashboard while using