What does it mean when there is a small light on the car's rearview mirror?

[Skylar]

A small light on the car's rearview mirror is part of the Blind Spot Monitoring and Warning System. When there is a moving obstacle approaching or moving away from the side or rear of the vehicle, this light will illuminate to alert the driver of the presence of vehicles or pedestrians in the blind spot. Function: The rearview mirror is a tool that allows the driver to directly obtain external information about the rear, side, and lower parts of the car while seated in the driver's seat. For the convenience of the driver and to prevent traffic safety accidents and ensure personal safety, all countries require that cars must be equipped with rearview mirrors, and all rearview mirrors must be adjustable in direction. Classification: Rearview mirrors are categorized by installation location into exterior rearview mirrors, lower rearview mirrors, and interior rearview mirrors. By purpose, exterior rearview mirrors reflect the rear side of the car, lower rearview mirrors reflect the front lower part of the car, and interior rearview mirrors reflect the rear of the car and the interior situation.