Note: 1. Please note that this product needs extra 4PIN power supply. 2. Please allow slight error due to manual measurement. 3. Different monitor colors may be different. Thanks for your kind understanding. Features: Support PCI-E to 4-port USB3.0. Maximum transmission speed of 5Gbps. All solid state power supply, good stability, 4 times that of ordinary power supply. Support for hot swap and plug and play. Applicable to a variety of chassis: PCI-E slot Widely compatible - For Windows 2000 / XP / Vista / win7 / win8 / win10. Specification: Type: PCI -E to USB 3.0 Converter Card Chip: VL805 Device type: 4-port USB 3.0 PCI-E card Interface type: USB 3.0 Data transfer rate: 5.0 Gbps USB power output: up to 5V 900mA Compliant with USB 3.0 specification revision 1.0. Compatible with USB 2.0 and 1.1 specifications. Complies with pci - e1x, pci - e4x, pci - e8x, pci - e16x. Support 2.5Gbps full-duplex channel PCI-E bus: YES Transmission speed: Support 5Gbps (ultra-high speed), 480Mbps (high speed), 12Mbps (full speed), 1.5Mbps (low speed) USB transmission speed Support for hot swap and plug and play: YES Power input: 4 pins Compatible systems: for Windows 2000 / XP / Vista / win7 / win8 / win10 Weight: Approx. 42g Size: Approx. 120 * 69 * 20mm Package list: 1 * PCI -E to USB 3.0 Converter Card 1、Support PCI-E to 4-port USB3.0. 2、All solid state power supply, good stability, 4 times that of ordinary power supply. 3、Maximum transmission speed of 5Gbps. 4、Support for hot swap and plug and play. 5、Widely compatible - For Windows 2000 / XP / Vista / win7 / win8 / win10.