1、[Accurate Reversing] The car reverse sensor system features four 22mm diameter sensors that provide X, Y, and 60 degree comprehensive monitoring, accurately predicting obstacles within a range of 0.3 to 2.0M to help avoid collisions and greatly enhance driving safety. 2、[Unique Alert System] The car backup sensor system features unique bibi three heartbeat alert sound, adjusts the buzzer frequency and volume based on obstacle distances. The buzzer emits a 65dB sound, ensuring clear audible alerts even in noisy environments. 3、[Clear Display] Equipped with a two digit display and a colorful glowing warning bar, the car parking sensor kit accurately shows obstacle distance and direction, providing clear information day or night for effortless and safe driving. 4、[Easy Installation] The kit comes with a 5 meter display cable and a 2.5 meter sensor cable, allowing for easy installation with simple drilling. 5、[Premium Material] The ABS material construction ensures impact resistance and erosion resistance. It operates at a working voltage of DC9 to 15V, rated voltage of DC12V, ensuring stable performance in various environments and long term safety during driving. Item Type: Car Reverse Sensor System Material: ABS Working Voltage: DC 9-15V Rated Voltage: DC 12V Number of Sensors: 4 Sensor Diameter: Approx. 22mm / 0.87in Sensor Direction: X, Y, 60 Degree Sensor Installation: Drilling Detection Range: 0.3-2.0M Alert Sound: bibi Three Level Heartbeat Alert Buzzer Volume: 65dB Sound Frequency: 1.6-2.0m 0.5Hz (Slow), 1.1-1.5m 1Hz (Slow), 0.6-1.0m 3Hz (Rapid), 0-0.4m (Continuous) Display: Two Digit Display Distance, Seven Color Glowing Warning Bar Display Cable Length: Approx. 5m / 16.4ft Sensor Cable Length: Approx. 2.5m / 8.2ft 1 x Display 1 x Controller 1 x Power Cord 2 x Double Sided Tape 1 x Drill Bit 4 x Sensor 1 x User Manual