BSD-Lens Light Alarm Safety Driving Vehicle Car Blind Spot Detection System Features: *Accessory for Blind Spot Monitoring System: This product is a lens light accessory and does not have its own blind spot monitoring function. It needs to be used with a blind spot monitoring system. *Compatibility: Suitable for all car models with Blind Spot Monitoring System, ensuring broad applicability. *Traffic: The transmits signals to the lens lights, providing timely to the driver regarding surrounding traffic conditions.