The Scosche ReVolt Dual USB Car Charger is a low-profile charger that plugs into the cigarette lighter in your vehicle. It has dual 12-watt USB ports that allow you to charge two devices simultaneously, including two tablets. Optimized charging circuitry means less powerful devices like smartphones will also charge at the fastest speeds possible without being damaged. The ReVolt fits flush in most vehicle power sockets to save space. To begin charging, simply connect the original charging cable that came with your device (sold separately).