Professional car front parking sensors. In the cab, you can't see the product. When it is working, you can hear the sound of the alarm! The built-in flat sensor is very nice-looking, just like the for original-part of the car. Note:Due to different production batches, there are slight differences between the actual product and the picture, which will not affect normal use. Two conditions for the operation of front-end radar: 1: When 2: When the sensor detects an obstacle The professional front radar can still work for about 10 seconds after power failure. For example, the driver activated the front radar at position 1,and when car reached position A,the car's speed was already slow.At this point, the driver will no longer brake, and the power to the radar will be disconnected. However, the product will continue to operate for about 10 seconds to detect and alarm at locations B and C. A professional front-end radar should have a detection range of around 1 meter, as the driver can clearly see obstacles beyond 1 meter.When waiting for a red light, if a useless alarm is generated due to the detection distance being too far, it may sound annoying. Front radar: When , the sensor starts to work.When it detects obstacles,the system starts to alarm;when the brake is released, the main power of the system is disconnected. At this time, the main board capacitor discharges the power,and the sensor continues to scan for 10 seconds and then stops.In order to make the driver turn or change lanes in small places,release the brakes,and get the warning of the parking sensor during the refueling process.Finally, the above two functions,the rear parking sensor does not have this function. Colour:Black Material:Plastic Package Contents: 1 * Car front radar detection system set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.