This is a PCI-Express card 4 x High-speed USB 3.0 interface expands, 4 ports can simultaneously transfer 5GB/S. When you need to use multiple external USB products at same time, this Express card be . PCI-E 2.0 x4 USB3.0 expansion card, with a theoretical performance transmission value of 20Gb/s, can connect USB3.0 traditional hard drives and solid-state drives, and supports RAID0, 1, 5, and. JBOD in systems mode, you can enjoy ideal combination of speed and storage within a low budget, meeting needs of players and digital image for high-efficiency reflection. Equipped with 4 D720200 chips with USB3.0 channels, it can fully utilize characteristics of USB3.0 high-speed transmission, and its stability and compatibility are ordinary chips. 4 sets of power supply modules, shielding electromagnetic interference, ensuring data transmission integrity and stability, four interfaces can run at same time, and support 3TB large hard drives. Dual power supply socket: SATA15PIN socket/large 4PIN power socket, fixed power socket 4pin power interface, stable and sufficient power supply, ensuring stable operation of equipment, low power consumption, environmental protection and energy saving. Chip used: Pericom Pl7C9X2G608GP+4xNEC uPD720202 Interface type: PCIE X4 (both X8 and X16 are applicable; to PCI slots) Applicable models: Conventional desktop computers Number of interfaces: 4 USB3.0, large 4PIN power, SATA 15PIN interface Supported systems: xp/Vista/win7, win8, win10 and other mainstream systems Installation conditions: There is one or more available standard PCIE slots on personal computer Color: Black Material: PCB+Metal Package Contents: 1 x 4 Port USB3.0 PCI Express Card Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.