Professional mechanics trust Schumacher Electric’s line of DSR ProSeries engine starters and battery chargers to deliver quality and reliability they can count on. Designed for the professional user, the DSR131 4-in-1 125A/250A 6V/12V Fully Automatic Battery Charger and Engine Starter guarantees power performance. The DSR131 boasts 125 cranking amp engine start for 6V batteries, a 250 cranking amp engine start for 12V batteries, 50A boost, 6A charge, and 2A maintain modes. With fully automatic operation controlled by a powerful microprocessor, the unit automatically adjust the amperage while charging and maintaining. It also employs auto voltage detection, an advanced multi-stage charging algorithm, float mode monitoring, bad battery detection, desulfation mode, and reverse hook-up protection. Users will also appreciate the professional-grade construction that ensures years of reliable operation even in the tough garage environment. Additional features include a rugged metal case; solid wheels; a retractable handle; heavy-duty, color-coded, 300A-rated copper clamps; 6-gauge, front-mounted copper booster cables; a digital display; LED indicators; and push-button controls.