color Black Features: This hub performs stable and is perfectly compatible with Windows， Mac OS or Linux systems. 4-port USB 3.0 hub， no driver required， plug and play. Supports data transfer rates of USB 3.0 Super-Speed (5Gbps)， USB 2.0 High-Speed (480Mbps)， USB 2.0 Full-Speed (12Mbps) and USB 2.0 Low-Speed (1.5Mbps) Backwards compatible with USB 2.0 & 1.1. Supports hot swap. All slots can be used at the same time for data exchange(if large capacity peripherals are used at the same time， external AC adapter is required but NOT included). Individual LED indicator of each port. Features on/off switch for all 4 USB 3.0 ports. Built-in over-current protection to protect both connected devices and the hub itself from unforeseen power surges. Elegant appearance and high quality. Specifications: Color: Black Material: ABS Interface: 4 * USB 3.0 ports Hot swap: Support Compatible systems: Windows 2000/ XP/ Vista/ 7/ Linux/ Mac OS 10. X or above LED indication: Blue LED USB3.0 Hub size: 10 * 4 * 2cm / 3.9 * 1.6 * 0.8in Cable length: 30cm / 11.8in USB3.0 Hub weight: 74g / 2.6oz Package size: 20.8 * 14 * 3.5cm / 8.2 * 5.5 * 1.4in Package weight: 116g / 4.1oz Package list: 1 * 4-Port USB 3.0 HUB