The Low Profile Shut Down Timer from Lind Electronics protects your equipment from low voltage and high voltage. It prevents your vehicle's battery from over discharge by turning off electrical loads at a preset time after the car engine is shut down. This versatile timer features easy time set and check with speed-up time testing switch. Apart from all these, it incorporates low and high voltage shut down with LED indicators for on, off and timing. Additionally, this shut down timer is capable of operating in ambient temperatures from -50º to 75ºC.