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 (1.5Mbps)
* 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