1. PCI-E X1 bus interface, suitable compatible with pci-e4x, 8x, 16x slots; expandable 4 USB PCI-E interfaces, effectively solving the problem of insufficient PCI-E interfaces on the motherboard.2. Adopting a plug-in design, it is directly connected to the motherboard interface without an extension cable, and it can be fixed to the chassis, greatly improving the stability and reliability3. The main control board adopts the PCI-E interface direct power supply mode, no external power cord is required, so that the main control board power is not interfered by the outside and has higher stability4. Reduce the number of adapters and adapter cables. One wire goes directly to the interface, effectively reducing interface interference and wire loss, ensuring data reliability, and improving work efficiency5. The USB connector is gold-plated, which reduces interference between interfaces and enhances data integrityProduct name: PCI-E 1 to 4 USB3.0 riser cardModel: PCE4USB-A01Data transmission speed: 5000 (MB/s)Support system: compatible with all WINDOWS systems, LINUX MACcolour:BlackMaterial:PCB+metalPackage Contents:1 x PCI-E 1 to 4 USB riser 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.