Transcend TS-HUB2K 4 Ports USB 3.0 Hub Type: USB Standards: USB 3.0 Ports: 4 x USB 3.0 Transfer Rate: Up to 5 Gbps Operating System Supported: Windows® XP (supports USB 3.0) Windows Vista™/ 7 / 8 / 8.1 (supports USB 3.0) Mac OS OS 10.2.8, or later (supports USB 3.0) Linux Kernel 2.6.3, or later (supports USB 2.0) Dimensions: 2.91 x 1.46 x 0.41 Weight: 0.06 lb. Temperature: 5°C(41°F)~40°C(104°F)