Features: PCI Express 4-port USB 3.0 expansion card for desktops. Maximum 5Gbps USB 3.0 transfer speed. NEC D720201 chip, low heat dissipation, fast speed and stable operation. All solid capacitance, and 12*12mm large enclosed inductors have long service life and stable power supply, which is 5 times that of ordinary capacitance. Each interface is equipped with a separate insurance security module to create a double protection for your computer. PCI-E gold plated interface. Backward compatible with USB 2.0, the maximum transfer rate is 480mbps. Specification: Material: PCB Model: HZG-720201 Main control chip: NEC D720201 Bus interface: PCIE x 1 (x 4 x 8 x 16 / graphics interface) Number of USB ports: USB interface * 4 Interface rate: 5Gbps Working environment: 0°C-70°C Applicable models: Suitable for large and small computer case System support: for XP Win7 Win8 Win8.1 Win10 SE Size: Approx. 120 * 75 * 69 mm / 4.72 * 2.95 * 2.72 in Weight: Approx. 49 g / 1.73 oz Package Iist: 1 * PCI-E to USB 3.0 Adapter Card Note: SATA 15-pin power supply. (Please plug in the power when working) 1、PCI Express 4-port USB 3.0 expansion card for desktops. 2、Maximum 5Gbps USB 3.0 transfer speed. 3、NEC D720201 chip, low heat dissipation, fast speed and stable operation. 4、All solid capacitance, and 12*12mm large enclosed inductors have long service life and stable power supply, which is 5 times that of ordinary capacitance. 5、Each interface is equipped with a separate insurance security module to create a double protection for your computer.