Gomadic Portable External Battery Charging Kit suitable for the Contour HD / GPS / Plus / 2 / ROAM2 Includes Wall, Car and USB Charge Options Intuitive color coded LED light indicators display when the battery is properly connected, in charging state, and fully charged. Super easy to use! Gomadic Kit includes ability to charge the Contour HD / GPS / Plus / 2 / ROAM2 battery from a variety of power sources including AC wall outlets, DC car cigarette ports, or any standard USB port Specification: Contour HD / GPS / Plus / 2 / ROAM2 Supported, Dimensions: 2.0 X 4.0 X 0.5 inches, Power Input: 110-240 VAC, USB Output Power: 5.0 VDC Simple operation. Quick start instructions provided. Gomadic phone and email support available for additional assistance if required. Fast, light weight, flexible and very compact form factor. Advanced internal circuitry protects from power surges, accidental reverse polarity, and overcharging.