1. Adds 4 external USB 2.0 ports to any laptop or notebook computer.compatible with any USB device.          

2.Hot Swappable - Add or remove USB devices while your system is running.                      

3.Supports both USB 2.0 (480 Mbps) and USB 1.1/1.0 (12 Mbps) devices and peripherals       

4.USB 2.0 EHCI (480 Mbps) and USB 1.1 / 1.0 OHCI (12 Mbps) compliant.                             

5.Fits any 32-bit PCMCIA Type II / Cardbus Slot.                                             

6.Supported OS:Windows 98SE/ME/2000/XP or above OS