Features: * Blue LED to indicate power status for each port * Data transfer speeds up to 480 Mbps * Four downstream ports support high-speed (480Mbps), full-speed (12Mbps), and low-speed ( 1.5M bps) * Supports up to 127 devices by daisy-chaining multiple hubs * Some power-intense USB devices may require a AC-Powered USB hub
System requirements: * Mac OS 9.1 & higher * Windows 98SE /ME /2000 /XP /Vista /7/8 * Linux 2.4 or above Package contents * USB 2.0 4-port hub