reVOLT is the worlds smallest yet most powerful DC receptacles for USB powered devices. Each of the two USB ports packs 12 Watts (2.4A) of power to charge two iPads at once. Plug in any combination of iPads, iPhones or iPods with your existing charge/sync cables. reVOLT is low-profile and lightweight, and fits flush in most vehicles power socket. 12 Watts Means You Get The Fastest Charge: Dual 12 Watt USB ports give you the fastest charging speed possible. The latest iPads have been designed to charge at 12 Watts, making reVOLT the ideal charger for these devices. Optimized charging circuitry will not cause any harm to less powerful devices—iPhones and iPods will also charge at the fastest speeds possible.Compatibility: The charging circuitry is designed specifically for iOS devices (iPod, iPhone and iPad) but will also work with other smartphones and tablets. Works with iPad, iPhone, iPod, portable speakers, Bluetooth headsets, GPS devices, digital cameras, most smartphones* and most tablets*.*Note: some Android devices may not charge at the fastest rate possible because of differences in charging circuitry. The USBC242M is currently not compatible with the Galaxy S5