Rig Rite Manufacturing 510 Marine Variable Livewell Timer On' cycle pumps for 30 seconds, 'Off' cycle is variable from 0 to 5.5 minutes Allows for continuous run for filling live well Keeps bait or fish alive without draining battery down 3 wire installation easily replaces your on-off switch 3/8 inches mounting hole for dashes up to 3/4 inch thick