The product is a rear defogger defroster switch for Chevy Sprint, GEO TRACKER, and Metro models from 1989 to 1991. It is a GEO factory OEM part designed to control the defroster in the rear of the vehicle. The switch is intended for placement on the front panel of the vehicle and is identified by the manufacturer part number 1991. This switch allows the driver to easily control the rear defogger to improve visibility in cold or damp conditions.