Flip up automatically to display distance of rear obstacle when reversing . Full angle screen with three colors to display different obstacle location . Flip down automatically when reversing stop . Waterproof brain Function Features: When car reversing the screen will flip open automatically . The parking system will check the working status of 4 sensors within 1s when it starts. It will display the sensor with symbols (1E, 2E, 3E, 4E), corresponding the sensors which is marked with A, B, C, D . When reversing, the system will detect like heartbeat style when reversing . Display the actual distance (2.5~0.30m) with digit number, measuring precision up to 0.01M . Display the location of obstacle with different colors . Outstanding performance under severe environment conditions such as raining or dark night, or high /low temperature, anti-jamming of electromagnetic wave