Two battery voltage mode selection: 6V and 12V Lead Acid. IMPORTANT: When you select the battery mode, You must disconnect the battery. Perfect for charging all lead-acid, flooded, sealed maintenance free batteries (AGM and gel cell) up to 75Ah, Safely maintain all types of motorcycle, automotive, marine, RV, powersport, lawnmower & garden etc. No sparks, reverse polarity protection, overcharging protection, short-circuit protection, over temperature protection, Bad battery identify and power down memory function. Adopt 4-stage smart charging and maintains principle (Initialization, Bulk Charge, Absorption Mode, Float Mode) to ensure maximum battery life and performance, without overcharging. Intuitive LED indicators provide visual charging state feedback and diagnostic information. Easy connection to vehicle battery using the included battery clips and O-ring terminals. Includes a 12-foot output cord and 2-year warranty.