Specification: Product Name: PCI-E 1 to 4 adapter card Product model: PCE4PCE-A01 PCB color: Blue Product Interface: PCI-E 1X Support system: Compatible with all for WINDOWS systems, for LINUX/MAC Size: Approx. 12 * 8.3 * 1.5 cm / 4.72 * 3.26 * 0.59 in Weight: Approx. 49 g / 1.73 oz Package Iist: 1 x PCI-E Card 1 x PCI Card 1 x USB Cable Note: The several PCI-E 1X slots that are separated are all in gen2 mode, even if they were gen1 before. This is a very good feature. Do not insert the PCI card reversely, and the reverse insertion will easily lead to burnout. For manual measurement of dimensions, there may be an error of 0 - 2cm, which is normal. Due to the differences between the different displays, the picture may not reflect the actual color of the item. Thank you!Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering The slot on the motherboard can be directly led out from the slot or placed on the slot connection board connected to the chassis. PCI-E 1X multi-interface card solve the situation that the desktop computer PCI-E 1X is not enough. It consists of two parts, one is the main card, 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, which are connected by USB 3.0 cable. The device card is used for transfer between PCI-E and PCI-E. But even with USB 3.0, the theoretical bandwidth is only 5 Gbps (625 MB/s), and the loss is only 150 MB/s in four minutes, and even the single channel bandwidth of PCI-E 1.x is 250 MB/ s, so this can give you the most slots, but not enough bandwidth, onl