Features: 1. The PCI Expansion controller has seven USB3.0 ports and one 4 PIN SATA power connector. Suitable for digital cameras, scanners, printers, external connect CD/DVD/Blu-ray burners, hard drives, flash drives, etc. 2. Strong compatibility, suitable for all Express34mm, Express 54mm slots. Install it onto PCs, it will expand seven more USB3.0 interfaces, improving efficiency and speed. 3. Four transmission speeds it supported: Low speed (1.5Mbps)/ Full speed (12Mbps)/ High speed (480Mbps)/ Ultra-high speed (5Gbps). Ultra high speed means saving much time for users. The actual transmission speed is limited by the settings of the connected devices. 4. It support supplying power for external devices through USB3.0. 5. Support USB 3.0 devices, backwards compatible with USB 2.0 & 1.1. 6. Support all USB standard data transmission as follows: Control/Batch/Interrupt/Synchronous Transmission. 7. Supported operating systems: for Windows XP, Vista, Windows 7/8. Specification: Material: PCB Port: 7 * USB 3.0 Port Transmission Speed: 5Gbps Max. Size: Approx. 12*7.3*1.2cm/ 4.72*2.87*0.47in Packing List: 1 * PCI Expansion Controller 1 * Driver CD 1 * User Manual 2 * Screw 1、The PCI Expansion controller has seven USB3.0 ports and one 4 PIN SATA power connector. Suitable for digital cameras, scanners, printers, external connect CD/DVD/Blu-ray burners, hard drives, flash drives, etc. 2、Strong compatibility, suitable for all Express34mm, Express 54mm slots. Install it onto PCs, it will expand seven more USB3.0 interfaces, improving efficiency and speed. 3、Four transmission speeds it supported: Low speed (1.5Mbps)/ Full speed (12Mbps)/ High speed (480Mbps)/ Ultra-high speed (5Gbps). Ultra high speed means saving much time for users. The actual transmission speed is limited by the settings of the connected 4、It support supplying power for external devices through USB3.0. 5、Support USB 3.0 devices, backwards compatible with USB 2.0 & 1.1.