Feature:[Blind Spot System] This 24GHz Ulsonic r Blind Area System is a vehicle aistance device that greatly helps you detect the poible collision risks in the blind spot during driving.[Single Microwave r] High-speed frequency for the left-rear and right-rear of the vehicle. The BSD system is activated with the turn signals, whenever there is a moving object pop into the rear of the vehicle, with the of LED lighting on, blinking, sound so that the driver can be cautious when lane changing to avoid the poibility of side crash accident.[Detecting Distance] The system uses a 24GHz millimeter-wave r chip, uses single nsmit and four receive s, is equipped with sophisticated computer algorithms, and automotive-grade quality waterproof plugs, with a range of up to 10m, can monitor the closing objects in the neigr lane within a range of 3.5m with speed gap over 0.5m/second.[ant Notes] This system integrates blind spot and aistance.This item fits for most DC12v sedan, compact, SUV, MPVs, pickup etc, doesn't suitable for vehiche with metal bumper.Specification:Working frequency: 24GHzWorking voltage: 12VMaximum distance: 10MPakage include:1 set Car Blind Spot System