Product Details  computer usb hub special feature high quality good price interesting model  computer usb hub Hi-speed USB 2.0 4 PORT HUB. Realistic design, bright colors, beautiful shape. small and easy to carry. 1) Using real hi-speed 2.0 chip 2) Hi-speed USB2.0 PORT, the highest speed reach 480Mbps, and downward compatible  3) USB1.1/1.0 standard specification with four USB ports, Hot-plugging supported 4) Fuse intergraded. Safe and convenience 5) Working Humidity: 10%~90% 6) Working Voltage: 5V 7) Working Current:500mA 8) Working Temperature: -20C~75C. 9) Stock Temperature: -40C-85C 10) System: Windows 95/98/2000/2003/ME/XP/Vista or Mac OS 8.1 (Divers needed in Windows 95/98 )