The Copeland Engineering TOP H.A.T. is the High (200) Amp enhanced version of PowerTamer VS Timer. It eliminates dead batteries caused by forgotten electrical equipment such asdata terminals and radios. This self-contained product features both voltage sensing and autoignitionsensing options for relay activation. It also features programmable times ranging from 15 minutes to 16 Hours. Low voltage disconnect activates when the battery is at 10.5 volts for 15-seconds. This ignores voltage dips caused by turning on the light bar, engine starting, etc.There are two LEDs. The GREEN LED monitors output voltage, and the RED LED flashes when power is first applied and during delay timing.