Adjustable Livewell Timer - Starting Battery PATENTED Technology with 3 Individualy Adjustable Time settings meant to SET IT AND FORGET IT ON Time is Adjustable from 2 minutes to 6 minutes OFF Time is Adjustable from 2 minutes to 30 minutes Automatic Shut off is Adjustable from 2 hours to 12 hours THIS MODEL is for a boat with an engine that contains an alternator: Battery Measuring circuit checks for low battery and shuts device off so you can run it overnight