With high technology system， this parking assist system helps a lot when parking your car.Features:2 sensors system with LED display.Anti-false alert technology.    Self-test function.    Learning function.    All weather design.    System activates automatically when gear "R" selected.Waterproof sensor connector.Specifications:Operating Voltage: 9-16V DCOperating Current: <300mAOperating Temp.: -40℃ to 80℃Detection Precision: ±0.05m / ±0.16ftSiren SPL: 80±10dBPackage Size: 18 * 13 * 6.5cm / 7.1 * 5.1 * 2.6inPackage Weight: 367g / 13ozPackage List:1 * ECU1 * LED Display2 * Sensor1 * Set Installation Accessory1 * English User Manual