1、Compliant with USB version:1.1/2.0/3.0 2、Support Windows 7/8/10, Vista, XP, 2003/2000/ME, Mac OS X and Linux systems 3、Supports High-Speed transmission rate 5G Mbps 4、Multiple built-in safeguards fully protect against over-current, over-charging and over-heating for safe and fast charging 5、Compact, portable, and classy design to keep your desktop well organized and cable chaos-free Features: 1. Compliant with USB version:1.1/2.0/3.0. 2. Support Windows 7/8/10, Vista, XP, 2003/2000/ME, Mac OS X and Linux systems. 3. Supports High-Speed transmission rate 5G Mbps. 4. Multiple built-in safeguards fully protect against over-current, over-charging and over-heating for safe and fast charging. 5. Compact, portable, and classy design to keep your desktop well organized and cable chaos-free. Specificaitons: Color: Black Transmission Interface: USB3.0 USB Charging Ports: 4 Size: 7.6 x 4.1 x 1.2cm / 2.99 x 1.61 x 0.47inch Package Included: 1 x 4 Port USB HUB