Rig Rite Variable Timer For Livewell Pumps. This timer allows for continuous run for filling livewell pumps. Keeps bait or fish alive without draining the battery down. The 3-wire installation easily replaces your on-off switch. The timer has a 3/8" mounting hole for dashes up to 1" thick. Features of Rig Rite 510 Variable Timer For Livewell Pumps Variable Livewell Timer "On" cycle pumps for 30 seconds "Off" cycle is variable from 0 to 5-1/2 minutes Allows for continuous run for filling livewell pumps Keeps bait or fish alive without draining the battery down Package Contents: Rig Rite 510 Variable Timer For Livewell Pumps Rig Rite 510: Variable Timer For Livewell Pumps