Rig Rite Automatic Timer For Livewell Pumps. The cycle position turns the pump on for 30 seconds every 3 minutes to keep bait or fish alive without draining the battery. Requires a 3/8" mounting hole for dashes up to 1" thick. Features of Rig Rite 500 Automatic Timer For Livewell Pumps Automatically turns livewell pumps on and off Cycle position turns pump on for 30 seconds every 3 minutes Keeps bait or fish alive without draining the battery down Easily replaces your on-off switch 3/8" mounting hole for dashes up to 1" thick Package Contents: Rig Rite 500 Automatic Timer For Livewell Pumps Rig Rite 500: Automatic Timer For Livewell Pumps