SEA HAWK 6 Outlet Heavy Duty Light Timer

 7200W 40 Amp Max SM-EARTH

(1 SECOND TO 99 HOURS ON / OFF))
This handy timer allows you to set the time period the unit is on, and the time period the unit is off, and then it cycles back and forth between the two. Each period can be set from from 1 second to 99 hours.