Sabrent 4 Port USB 3.0 Hub with 4A Power Adapter support Fast charging Function [VIA VL812 Chipset] (HB-J3U4) 4 SuperSpeed USB 3.0 ports support data transfer rates of up to 5Gbps. (Note: actual rate will depend on the capability of your device.) Backward compatible with USB 2.0 / 1.1. power port offers enough current to charge both a smartphone and a tablet at high speed. USB 3.0 ports supply 0.9A each. Supports Plug and Play and hot swapping. No installation of drivers required for Windows XP / Vista / 7 / 8 or Mac OS X 10.2 and above.