Designed for professional mechanics, Schumacher Electric's DSR ProSeries line of wheeled battery chargers provides an array of superior-quality battery chargers with the power and features pros want. Experienced mechanics know that a powerful wheeled battery charger and engine starter is essential equipment and that DSR ProSeries chargers can't be beat. The DSR ProSeries 6-in-1 330-Amp 6V/12V/24V Wheeled Power Supply, Battery Charger, and Engine Starter (DSR124) features 300 cranking amps (6V), 330 cranking amps (12V) engine start, 250 cranking amps (24V) engine start, 30-amp to 80-amp boost, 15-amp fast charge, and 4-amp maintain modes. In addition, the DSR124 features a 70-amp/100-amp flash reprogram mode and a memory saver function. Fully automatic and microprocessor controlled, the DSR124 features multi-stage charging, float mode monitoring, and reverse hook-up protection. Another stand-out feature of the unit is its superior durability and construction including a heavy-duty internal transformer, rugged steel case, solid wheels, brawny copper clamps, thick 4-guage output cables, and a sturdy, retractable handle.