Gomadic Compact Multi External Battery Charge System designed for the Casio Gzone Rock C731. USB, Car and Wall charging connections Gomadic Kit includes ability to charge the Casio Gzone Rock C731 battery from a variety of power sources including AC wall outlets, DC car cigarette ports, or any standard USB port Intuitive color coded LED light indicators display when the battery is properly connected, in charging state, and fully charged. Super easy to use! Specification: Casio Gzone Rock C731 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. A quality product backed by the comprehensive Gomadic Lifetime Warranty.