Fully automatic battery charger for regular automotive, lead-acid, calcium, AGM, start-stop and Gel Cell batteriesMaintains stable voltage under varying loads during major vehicle ECU reprogramming and diagnostic workVoltage can be set between 13.0-14.8VVariable charge rates: 4/20/70ADigital volts and amps displayManual mode with digital timerExtended reach output cablesHeavy-duty clamps with replaceable jawsAdjustable mounting brackets for easy permanent installation to most shop vehicle liftsDual temperature-controlled cooling fans