Features: 1.Super speed USB 3.0 transfer rate up to 5Gbps. Four USB interfaces can work independently and will not effect each other. 2.Compliant with USB 3.0 ; Compatible with USB 2.0 & 1.1 . 3.Premium material and workmanship, high quality and long lifespan. 4.Four-phase power supply, providing enough power. 5.Four independent fuses can well protect peripheral device and your computer from damage caused by short circuit. specification: 1. Super speed USB 3.0 transfer rate up to 5Gbps. 2. Compliant with USB 3.0 ; Compatible with USB 2.0 & 1.1 . 3. Premium material and workmanship, high quality and long lifespan. 4. Four-phase power supply, providing enough power. 5. Four USB interfaces can work independently and will not effect each other. 6. Four independent fuses can well protect peripheral device and your computer from damage caused by short circuit. s: Type: 4 Ports USB3.0 Expansion Card Chipset: NEC D720201 Bus Modes: PCI-E x1 Compatible Slot: PCI-E x1/x4/x8/x16 USB Interface: 4 x USB3.0 Port Transfer Rate: USB3.0 5Gb/s Current: 2A of Each Port Support OS: Windows XP 32/64 Windows 7 32/64 Windows 8 (Support plug-and-play) Windows 8.1 (Support plug-and-play) Windows 10 (Support plug-and-play) Product Size: Approx. 120 * 88 * 84mm / 4.72 * 3.46 * 3.31INCH Gross Weight: Approx. 110g Package Included: 1 x USB3.0 PCI-E Expansion Card 1 x CD Driver 2 x Screw Note: 1. Please allow 1-3mm differs due to manual measurement. 2. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.