PCI-E interface expansion effectively solves the insufficient PCI-E interface. This product can be expanded to 4 PCI-E No need for external power supply, plug and play, more stable The high-speed USB3.1 interface and data cable are used for PCI-E high-speed data transmission, which effectively guarantees the integrity of the data signal All solid capacitors: stable work, , low energy dissipation High gold plating, wear resistance, good contact Product interface: support PCI-E X1 (compatible with X4 x8 X16) Number of interfaces: interface PCI-E X1 interface *4 System: os /Windows / Linux (The color of the card slot of the PCIE 16X adapter card and the color of the USB data cable are randomly sent, and no designation is accepted) Colour: black Material: PCB Package Contents: 1 x PCIE X1 expansion card 4 x PCI-E 16X adapter boards 4 x PCI-E 1X adapter cards 4 x USB 3.0 cables Only the above package content, other products are not included. Note: Light reflection 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.