MoKo Protable 4 Port USB 3.0 Superspeed Hub For Macbook Air, Surface Pro, and Windows 8 Tablet ( 4 Port Compact, Bus-Powered, Built-in 1.46 Cable ), Black Compact palm-sized grip (4.2 * 1.5 * 0.8in) and lightweight (1.8oz) with blue LED indicating operation status. Super speed USB 3.0 port enables data transfer rate up to 5Gbps. Backward compatible with USB 2.0(High Speed 480Mbps),USB 1.1.(Full Speed 12Mbps) Compatible with the Win 7/ Win 8/ XP/ VISTA/ MAC OS without installing drive.(MAC OS can not work if latest update not applied.) Built-in over-current protection to guarantee safety of both connected devices and the hub itself from unforeseen power surges. Package contents: MoKo USB 3.0 4-Port Hub with built in USB cable (1.46ft), user manual. 12-month hassle-free warranty