4-port USB interface expansion configuration 4-port usb3 0 is downward compatible with USB20 and usb1 1. Support the hot plug function of USB devicesThickened gold-plated finger and motherboard USB slot connection ensures data transmission integrity and stable operationNo self power supply plug and play, with four power supply capacitors, no external power supply portPCI-E X1 interface can be easily expanded, plug and play, convenient and fast as long as the motherboard has PCI Express X1 / 4 / X8 / x16 slots.The high-performance main control chip is a fully intelligent chip. The core chip uses hardware architecture to work independently, does not occupy computer CPU resources, and has low power consumption. It can easily process some big data and big video signals.Product name: PCIE to 4-port USB30 expansion cardNumber of interfaces: USB3.0*4Applicable slot: PCI-EX1/X4/8/X16Bus bandwidth: about 5Gb/sProduct size: 120MMX96MMx83MMWorking environment: 0Celsius-70CelsiusApplicable system: Windows XP/Win7/win8/win8.1/Win10, etc.Colour:blackMaterial:PCBPackage Contents:1 x Expansion CardOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.