Enjoy effortless Car Reverse Parking Sensor with LED Display - Black and self inspection function upto 200-30cm Range. The unit will work automatically when car start. 4 sensor design,precisely detecting the obstacle. Digital directional and sound reminder. Detection range upto 200 cm. Installation given on the product package. Features: Make parking easy. Rings warning alarm if any object is too close. Maintain your car safety against parking dings & dents. LED screen on your dashboard makes it more easy warning the distance left bwtween your car and object. Easy to install. Package Contains: 4 Ultrasonic sensors, 1 Main box, 1 LED display for dashboard, 1 Drilling aid, 4 Cables.