During the driving process, when the side or rear vehicle is in danger of collision with our vehicle, the LED will light up to remind the driver; if the left/right turn signal is turned on, it will be accompanied by an audible warning. to monitor the blind area when the car is started. When you open the door, if there are , pedestrians and motorcycles behind, they will be monitored and the alarm will be . Our blind spot monitoring can distinguish between stationary objects and moving objects. Stationary objects will not alarm. Vehicles, pedestrians, bicycles and motorcycles in a driving state will sound an alarm when they are monitored.When for : After parking, the car behind will stand still, and no alarm will be issued in the blind area. Normal driving: When the car behind is slower than us, there is no danger of collision and there is no warning; similarly, when we overtake, the speed is faster than the car behind and there is no warning.Working principle: 1. The system is a vehicle auxiliary device can help the driver to safely change lanes while driving. 2. Use a 24 GHz radio frequency sensor to detect the side/rear of the vehicle, and then move the object to the blind spot of the detection area. 3. The system acts as a control unit (LED computer), two microwave radar sensors, two blind spot monitors (or LED ), buzzer and wiring harness, and is a perfect combisnation of microwave radar sensors and computers.4. There are blind spots on the rearview mirror of the vehicle, which can easily endanger driving safety After installing the millimeter wave radar on your car, as long as there is a moving object at the rear of the vehicle, the LED will flash regardless of day, night or in the snow. The sound signal reminds the driver to be careful when changing lanes to avoid thepossibility of a side collision.Specifications:Working voltage:12VWorking frequency band:24GhzWorking temperature:-40~ +85 consumption: less than 2WWater-proof level:IP67Distance resolution:0.5mRange accuracy:Superior to 0.18mDetection distance:20mTransceiving antenna: single sending and single receivingRadar chip: Microcontroller chip: Block the third : NoSame speed warning: NoB-pillar warning: No blind spot monitoring: ( on)LCA change assist: (-on )AOA overtaking warning: NoRCTA reversing warning: NoColour: blackMaterial: ABSPackage Contents:2 x 24Ghz millimeter wave radar1 x Buzzer Cable1 x extension Cable (5m)2 x Indicator extension cable (4m/bar)1 x Radar Cable2 x Mounting bracket1 set x AccessoriesOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.