Purpose: To solve the situation that the desktop computer PCI-E 1X is not enough. Reminder: If you need multiple PCI-E x1 slots and there are not so many on the motherboard, you can consider it. It consists of two parts, one is the main card, which is installed on the motherboard through the PCI-E x1 interface, and the other is the device card, which has three or four PCI-E x1, and the two are connected together through a USB 3.0 cable. But even with USB 3.0, the theoretical bandwidth is only 5Gbps (625MB/s). If it is divided into four parts and the loss is eliminated, it is only 150MB/s. Even PCI-E 1.x has a single channel bandwidth of 250MB/s. Therefore, this device can provide you with the most slots, but the bandwidth is insufficient. It is only suitable for places where performance is not required. Therefore, the PCI-E slot to be transmitted is preferably version 2.0 or higher, and version 3.0 is better. We will test it before shipment, but computer compatibility problems are very common. So before you buy this product, please confirm whether your computer is compatible. Note: PCI-E 1X slots are all in gen2 mode, even though they used to be gen1. This is a very nice feature Product name: PCI-E 1X multi-interface card Colour:blue Material:PCB Size:10 x 7 x 0.15cm Package Contents: 1 * main card 1 * device card 1 * data line Only the above package content, other products are not included. Note: Light 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.