Basic InfoModel NO.:YS-G1Portable Travel Dual 2 Battery Charger Mini USB Cable for GoPro Hero 4 ADescription:Compact Portable Design,Website:http://www.amblefree.com, Convenient for travelers and business users.Compact battery charger is a handy companion for digital shooting.Charge your battery with any USB-enabled Notebook, PC, or MAC.2 Battery Slot, you can charger 2 battery at the same time.Quick charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock.Specification: Input: 5V 1AOutput: 4.35V 800mA (x2)Dimension: Approx. 5.5x4.5x2cmCompatible Battery: Only GoPro HD Hero 4 Package Included:1x Dual Battery Charger for GoPro 41x Mini USB CableNote: The batteries are NOT included.