Gomadic USB Charging Data Coiled Cable for the Garmin Nuvi 855 Will charge and data sync with one unique TipExchange enabled cable Specification: Cable length: (12 to 30 inches), Outer Shell Material: (Coiled PU), Internal Leads: 24AWG, TipExchange Connector Design (Garmin Nuvi 855 Specific) Included TipExchange technology enables cable to be easily upgraded by simply switching the physical connector plug. Specific connection for the Garmin Nuvi 855 is included, with additional connectors for thousands of other devices available separately. No additional AC power required. Uses power from the USB port of the computer to charge the Garmin Nuvi 855 Well-made, coiled construction custom built for dual sync and charge services of the Garmin Nuvi 855. Works from the standard USB data port of any PC. Supports USB 1.1, 2.0 and 3.0 transfer standards