Battery Tender charging adapter suitable for 12-volt motorcycle systems and useful for long-distance travel. Designed to convert current to 5 volts for charging mobile devices, GPS units, cameras, and other gadgets. Inverter housed in a plastic casing with reliable moisture protection. Equipped with standard USB-A port and SAE connector. Maximum output current 2.1 amps, with power designed for charging only one device at a time. Operation simple: connect to the system through SAE connector and plug into the USB port