The Schumacher FR01335 is a fully automatic battery charger and engine starter designed for use with heavy duty farm equipment. With 150 Amp (6V) and 200 Amp (12V) engine start options and 40A boost mode, this unit delivers results when you need it most. Microprocessor controlled to automatically adjust the amperage rate to charge and maintain, with multi-stage charging for added precision, safety and battery life. Includes float mode monitoring to automatically maintain optimum battery charge, as well as reverse hook-up protection with an LED light indicator that prevents the charger from operating if the clamps are reversed. Schu Eco Energy meets the highest industry standards. DOE compliant.