The ToughTested PowerFlex 3.4 Amp Dual USB Car Charger with 3-inch flexible gooseneck extension makes it easy to access your power your mobile devices in a vehicle. It has a full 3.4 AMP of power, able to charge most tablets and smartphones simultaneously. The 2.4 AMP port charges a tablet, or a smartphone in half the time. The 1 AMP port can be used simultaneously with 2.4 AMP port to charge your phone and tablet concurrently.