Features: 4 USB Port to use at the same time, each supplies power 500mA (max.) Multi color plastic case Particular dramatic arrowheaded shape USB 2.0 device supports 480Mbps (max.); USB 1.1 device supports 12Mbps (max.) Specification: Mechanical Dimension: 87(L) x 49(W) x 9.5 (H)mm Color: Red, Green, Blue USB 2.0 high speed transfer port, compatible USB 1.1 downwards No driver required, plug and play, support hot swapping Built-in over current short circuit protection setting, protect your computer and device from damaging System requirements: Windows ME/2000/XP/Vista Macintosh OS 9.0 or higher Linux Kerndl 2.4.1 or higher Working Temperature: -20℃ to +65 ℃ Humidity: 20% RH to 85% RH Packing: white box and carton Package includes: 1X USB cable