The 4 Port bus powered USB 3.0 hub provides 4 additional USB 3.0 ports for your PC or MAC allowing you to connect USB devices such as mice keyboards external hard drives flash drives and printers. The portable handy design is ideal for travel and versatile enough to meet your connectivity needs. Specification • Fully compliant with USB3.0 (Super Speed) specification • Compatible with USB2.0 (High Speed) specification • Compatible with USB1.1 (Full Speed) specification • Data transfer rates up to 5 Gbps (USB3.0) • Supports  Windows 8.1 8 Win 7 Vista and XP • Supports MAC OS 10.9 and above Features • Over-current detection and protection • Plug and Play hot swappable • Dual USB Y Cable for extra power (150cm) • LED power indicator