Gomadic compact and retractable USB Charge cable for Aerb Waterproof MP3 Player - USB Power Port Ready design and uses TipExchange Ever been stranded with a dead battery because your USB data cable didnt put your Aerb Waterproof MP3 Player into charge mode? At Gomadic we resolved this issue ... read on below in to learn what we do different with our USB Power Port Ready cables Included TipExchange Tip ensures the fastest charging by putting your phone into charge mode rather than the typicale USB data mode that every other brand does ... this attention to detail resulting in faster and more consistant USB power port charging Cable tip wiring and power configuration is designed to Aerb specification to guarantee to put your Waterproof MP3 Player into the proper charge mode for the fastest charging possible cable expands from 2 to 34 inches in seconds (and everything in between). Simply press the integrated retraction button, and the cable effortlessly rolls back into the casing. no additional AC power required. Uses power from the USB port of the computer to charge the Aerb Waterproof MP3 Player.