Number of ports     5
Types     4x USB A-Type Recepticles for connecting downstream for USB devices, 1x USB B-Type Recepticle for upstream connection to PC or other USB hub
Power supply     DC 5V/2.5A external AC power supply
Other     Connectivity: 5 cascaded hubs maximum, Supports Windows 7/Vista/XP, Linux, Mac OS 9.0 or higher
Warranty     24 months