1MAIN USE: The safety belt is a part of the passive safety system, mainly used to prevent passengers from colliding with hard components inside the vehicle and other passengers, thereby reducing injuries. 2INSTALLATION INDICATION: Assemble between the sponge and the steel base to feel the pressure and trigger the safety belt reminder system. 3ENSURE SAFETY: Seats belt reminder sensors detect passengers and occupants on the rear seats. Provide maximum safety for passengers inside the vehicle. 4FOR CAR: The interior safety belt reminder system triggers a warning light or an audible bell to remind passengers who have not fastened their safety belts to fasten them. 5ABS MATERIAL: Made of premium ABS material, this pressure sensor is wear resistant and impact resistant, ensures stable and timely response.