1. [Upgrade and expand your computer] Provide five external USB 3.0 ports for any computer system that supports PCI Express, 2. [Improve work efficiency] The maximum transfer speed of USB3.0 ultra- High speed is 5Gbps, which is 10 times faster than USB2.0, allowing you to quickly transfer movies, photos, music and other data. Note: Actual speed may be limited by the connected device. 3. [Wildcard] compatible: support Windows 10/8/7 / Vista / XP; USB 3.0 is backward compatible with USB 2.0/1x devices; PCI Express slot supports PCI-E versions X1, X4, X8, X16. 4. [Safety, sufficient support] Additional power supply is required. Equipped with 15-pin SATA power connector, connect host power via 15-pin SATA power cable to power the device. 5. Used to connect other external hard drives, CD/DVD drives, printers, scanners, mouse keyboards, etc. to the computer system to provide more computer functions. Host interface: PCI Express (PCI-E) Data transmission rate: up to 5.0 Gbps Output: 5V/1A MAX (each USB port) Expansion port: 2 Type C + 3 Type A Color: black Material : Metal + PCB Size: 8.1 x 9 x 1.8CM Package Contents: 1 x Expansion Board Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The allowable measurement error is +/- 1-3 cm.