BSD System: Helps drivers to monitor their blind spots and effectively improve driving safety in the following driving environments. 24Ghz Millimeter Radar: This system product can warn the dangerous targets in the adjacent lanes. Early Warning: During driving, when the side and rear vehicles are in danger of colliding with , the warning light light up to remind the driver. If the left/right turn signal is turned on, it be accompanied by an audible warning. The blind spot detection system can distinguish between stationary objects and moving objects. Stationary objects do not alarm. Pedestrians and vehicles in a driving state sound an alarm when they are detected. When waiting for traffic lights: After parking, the car behind is still, and the blind spot detection system does not alarm. Normal driving: When the car behind is slower than us, there is no danger of collision and there is no warning. Applicable conditions: Universal (There must be no metal objects in front of the 2 radar signals to block the radar) Operating frequency band: 24Ghz Working voltage: 12-24V Power consumption: Less than 2W Waterproof level: IP67 Working temperature: -40 to +85/-40 to 185 Distance resolution: 0.5m Ranging accuracy: 0.2m Velocity measurement accuracy: 0.18 m/s Detection range: Lateral distance: 0.-4.4m Rear side distance: 20m Detection range accuracy: equal 96% System alarm accuracy: equal 96% Alarm method: Method 1 LED light turn on. Method 2 LED flash and buzzer sound. Colour:As Shown Material:ABS Package Contents: 2 * Radar 1 * Power cord 1 * Radar extension cable 1 * Power extension cable 2 * Warning light extension cable 2 * Mounting bracket 1 * Buzzer 2 * Highlight warning light 1 * Cable ties kit 1 * Angle ruler 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.