Powerful enough for starting SUVs, trucks and large batteries Battery and alternator tester - provides charge level and helps diagnose electrical problems Digital display, LED indicators and button controls - for ease and accuracy Microprocessor controlled - automatically adjusts the amperage rate to charge and maintain Multi-stage charging for added precision, safety and battery life Float mode monitoring - automatically maintains optimum battery charge Auto voltage detection - 6 or 12 volt Reverse hook-up protection - charger will not operate if clamps are reversed; LED will flash