dodocool Superspeed 4-Port USB 3.0 HUB for Desktop Ultrabook 5Gbps Support Windows, Linux, Mac OS (4-Port USB Hub) Complys to USB3.0 specification and 5Gbps theoretical transmission speed. 4 * USB3.0 ports support 4 USB devices used at the same time. USB3.0 ports provides balanced transmission, low--power dissipation, no noise, secure and stable. Unique over-voltage protection and current overload protection effectively protect HUB and connected devices. Support Windows, Linux, Mac OS.