Schumacher PSW-7700 DSR ProSeries 300/70/35/30/15 Amp 6/12/24 Volt Manual Wheel Battery Charger/Starter Charges 6, 12 and 24 Volt batteries 300 ampere engine start 2 hour timer Automatic overload reset and short circuit protection UL outdoor approved/CUL approved charges 300 ampere engine start 2 hour timer.4 Gauge, 9 ft. output cable Automatic overload reset and short circuit protection UL outdoor approved/CUL approved