TRIPP LITE 4-Port USB Charging Hub with OTG Hub Tablet Smartphone iPad (U280-004-OTG) Charge up to 4 tablets, phones, or other mobile devices Includes two 5V, 2A ports and two 5V, 1A ports Doubles as a USB OTG Hub when not being used for charging; connect up to four USB devices (flash drive, mouse, keyboard, etc.) to your OTG compatible tablet or phone USB Battery Charging (BC) specification 1.2 compliant. Supports iPad; iPhone; Samsung Galaxy (Tab, Phone, and Note); Microsoft Surface; and more Sleek, compact design keeps charging area neat and clutter free 2-year limited warranty Internal power supply eliminates the need to fumble around with bulky power adapters