1. PCIe USB 2.0 four-port expansion card, providing four 4 external A-type USB 2.0 (480Mbps) port 2. Support high speed: 480Mbps, full speed: 12Mbps and low speed: 1.5Mbps data transmission mode Can operate multiple USB 2.0 / 1.1 devices simultaneously 3. Compliant with PCI Express Specification 1.0a and USB Specification Revision 2.0 4. Support hot plug function so that you can connect / disconnect the device without shutting down the system first 5. Can be used with various types of USB devices, including , removable drives, digital Code camera, scanner, CD-RW, DVD-ROM, PC camera, printer, etc. 6. Support Windows2000, XP / 2003 / Vista, Win 7 32 / 64bit, support PCI Express system with available PCI Express slots Name: 4-port USB 2.0 expansion card Main controller: MCS9990 Media interface: 4 * USB 2.0 colour:black Material:ABS + Metal size:Motherboard size: 67 * 60mm Package Contents: 1* 4 Port USB 2.0 Expansion Card Note: Even if a USB 1.1 device is connected to a USB 2.0 host adapter or USB 2.0 hub, it can only be limited to USB 1.1 speed. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.