Fully automatic 3 Amp battery charger / maintainer. Keeps stored lead-acid batteries charged. Charges and maintains small batteries. Microprocessor controlled multi-stage charging for added precision, safety and battery life. Automatically detects 6 or 12 volts batteries. Float mode monitoring automatically maintains optimum battery charge. Reverse hook-up protection helps protect battery and charger from damage. Auto-voltage detection. Hook attachment hang outside the work area for safety and convenience. Press the display button to show the charge progress. Energy efficient/eco friendly meets the highest industry standards for energy efficiency. Content: 3 Amp battery charger, clamp adapter, DC adapter, 24" (61 cm) fused ring leads harness with weather cap, owner’s manual.