What You Get: 1 x 4 Port USB 3.0 Hub with screw clip, 1 x 3.3 Ft Cable(1M), 1 x User Manual, our 12-month worry-free and friendly customer service. Four Ports Hub: Transform one of your computer’s USB ports into 4 USB 3.0 ports, to meet your diverse demands of transmission and expansion for accessing smart phones, external hard drives, flash drives, keyboards or other , Windows 8, 7/Vista/Mac OS /Linux system supported. USB 3.0 5Gbps Data Transfer Speed: USB hub is equipped with USB 3.0 high speed interface, which is 10x faster data transmission speed than USB2.0 (up to a maximum of 5Gbps). And the usb hub is backwards compatible with USB2.0 and USB1.0. Premium Aluminum Alloy Material: The premium material promises a durable use, enable to dissipate heat rapidly, while its sleek design matches well with any surroundings. Clamp Design Hub: The USB 3.0 hub is equipped with an adjustable and strong screw clip, can fit the thickness from 0.39 to 1.26 inches (10-32mm, please note). It allows you to fix it on the edge of the desk or computer screen edge, very easy to install tightly and it won’t lose with the rubber cap at the top of the screw.