Thinking of to install parking sensor to your Viva?This is maybe useful info to you.Reversing sensor, also known as parking assist system, or backup computer alert system. Typically, parking sensor from the ultrasonic sensor (commonly known as probes), controller and display (or buzzer) and other components. Principle of ultrasonic distance measurement system, under the control of the controller, the ultrasonic emission sensor signals, when the encounter obstacles, the generated echo signal, the sensor receives the echo signal data processing by the controller to determine the obstacle position, distance and issued by the display of other warning signals, timely warning, so do the hearts of drivers reversing the "numbers" to make reversing easier. Parking sensor before the market several brand...