Schumacher PSW-3060 ProSeries Professional Heavy-Duty 6-12 volt wheeled charger with 300 Amp crank Assist, designed for the professional in mind, This unit features multiple charging rates for both 6 and 12 volt. A 2.25 hour timer provides ample time to charge most batteries. 100 amp built in load tester for measuring battery status. Over sized selector switches for easy handling with gloves on. Large face clear view meters provide data needed to diagnose and charge. The heavy duty cable set is grounded for protection and oil resistant for durability. Heavy duty steel cabinet with excellent finish provide rust protection for a long life and features heavy-duty rubber wheels for rough surfaces. High efficiency fan cooling keep the unit cool even under high ambient conditions and a 9 foot power cord provides extra reach for large garages.