Featuresr 2 usb charging portsr 2 usb charging ports enable you to charge up to two usb powered devices simultaneouslyr smart fast chargingr the two smart usb charging ports intelligently detect and deliver the optimal current to connected devices each usb output is up to 5v 24a total usb output is up to 5v 34ar safeguard your devicesr built in over current and short circuit protection keep you and your devices safer travel readyr international voltage compatibility ac 100 240 v and mi