Dr. USB / Doctor USB - A Universal, High-Speed / High-Power Charger w. Data Guard Save Time : Significant increase amperage available from charger, cutting down charging time Stay Safe : It turns any normal USB port into a "Charge only" port. No data transfer Universal compatibility : Works with any USB Port - PCs, Power banks, Car/Travel Chargers, etc.! Portable: Just 7g and only slightly larger than a pack of gum - 1.65" x .83" x .35" [42mm x 21mm x 9mm]