SIIG 4-Port SuperSpeed USB 3.0 Hub for Windows or Mac (JU-H40E12-S1) Instantly adds four USB 3.0 ports to your desktop, notebook PC or Mac via a Super Speed USB 3.0 port Super Speed USB 3.0 5Gb/s data transfer rate delivers high resolution and high bandwidth data smoothly and efficiently Built-in over-current protection to safeguard valuable data and the connecting devices Works with high-bandwidth USB 3.0 devices, such as external hard disks, high resolution webcams, camcorders, video surveillance cameras, digital video cameras, multi-channel audio and more Supports Windows 8 / 7 / XP, Mac OS 10.8 and fully backwards compatible with USB 2.0/1.1 specifications