* Plastica case and coated * Color: red , black , blue ,silver * Fully compliant with USB2.0/USB1.1 * Supports max: USB2.0,480mbps/USB1.1 , 12mbps * System requirement: Windows 98/ME/2000/XP * PC desktop or notebook with usb port * Expand 4 hub ports * Macintosh requirement: Support Mac OS 8.6 or above * USB has power, no external power required