Feature: 1. Fast transfer speed up to 5Gbps that is much higher than USB2.0. 2. Downward compatible with USB2.0, USB1.1 and USB1.0. 3. Built-in SATA power supply interface. 4. Support USB hot-plug. 5. USB 3.1 provides fast data transfer speed. 6. [Super Speed]: Supports transfer rates up to 5Gbps. Up to ten times faster than USB 2.0. 7. [Suitable]: Mainboards/Motherboard with PCIe (PCI Express) interface. Built-in SATA power supply interface. 8. [Portable]: Lightweight and portable to carry. Easy to set up and disassemble. Do not need any drive. Support USB hot-plug. 9. [Compatibility]: Backward compatible with USB 2.0 /1.1/1.0 connections. 10. [Best Service]: We will provide friendly customer service and 100% after-sales service. So I believe you will have a wonderful shopping experience. Specification: USB3.1 provides fast data transfer speed, but the ordinary hard disk cannot reach at that speed. It muse use SSD to achieve a fast speed. Now, we present you this USB3.1 GEN1 5G Type-C expansion card to experience double-side plugging card. Features: Fast transfer speed up to 5Gbps that is much higher than USB2.0. Downward compatible with USB2.0, USB1.1 and USB1.0. Built-in SATA power supply interface. Support USB hot-plug. Specification: Item size: 12 * 7.5 * 1.7cm / 4.72 * 2.95 * 0.67in(L * W * H) Item weight: Approx.48g / 1.69oz Package size: 12.3 * 10 * 2.5cm / 4.84 * 3.94 * 0.98in(L * W * H) Package weight: 76g / 2.68oz Package list: 1 * Expansion Card 1 * Driver CD Package List: 1 * Expansion Card