Manual operated trickle, slow and maintain battery charger. A must for motorcycle owners. Has a quick disconnect harness with ring connector. Hook the harness up once. No need to take the battery out again to charge it. For 6V or 12V batteries. 1A trickle charge rate charges in 2 to 12 hours. Reverse hook up protection. Quick disconnect harness snap either connector into place in seconds or use the 50A clamps or permanently attach the ring connectors. Great for hard-to-reach motorcycle batteries. Molded plastic case.