Features: brand new and high quality Compliant with PCI for Express specification Revision 2.0. Compliant with Universal Serial Bus USBB 3.0 specification Revision 1.0. Backward for USB2.0 and PCI-Express 1.0. Each interface has an independent interface for protection insurance. Each interface has an independent voltage regulator, stable power supply. The capacitor is a solid-state patch that can withstand 250 degrees of high resistance. It adopts heavy metal technology, good conductivity and strong oxidation resistance. Specifications: Type: 4-port USB 3.0 extension card Chip: NEC720201 PCI-e x1x4/x8/x16 port USB interface: 4 x usb3.0 Transmission rate: USB2.0: 480Mbps USB3.0: 5 Gbps Product size: approx. 120x75x69mm/4.72x2.95x2.72in Power output for USB3.0 interface: 5V/900mA (with PSU connected) Supporting operating system:Win 7/8/10 / Vista / XP, Server 2008 R2 32/64-bit, Linux Kernel 2.6 or later Package Includes: 1PC x USB 3.0 PCI-Express expansion card 1PC x Driver CD 1PC x Half height board note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!