Features: 1. Portable size, Compact, light weight design, 2. Plug and play, no driver installation required. 3. Fully compliant with USB 2.0/ 1.1. 4. Supports data transfer rate up to 480Mbps. 5. Expand 3 USB ports supply up to 500mA current per port. 6. Support downstream wrong signal detection and revert to normal function. 7. Power consumption, low operating temperature so solts and slots without interfere with each other. 8. Allows simultaneous operation of up to 3 separate devices all attached to a single USB port. 9. USB A male connector can be rotated 180 degrees, easily meeting users' USB orientation angle demands. 10. Supports Win ME/ Vista/ XP/ 2000/Win 7 Mac OS 10.4.5/ Linux 2.4.1 and so on. Specifications: Device Type: 3 Ports USB Hub Interface Type: USB 2.0 Dimension: 1.9" L x 0.7" W x 1.7" H (49 x 19 x 44 mm) Feature: Rotary design Color:White