1.2 layer PCB bard designing.2. Compliant with PCI express 2.0, 1.1 Specification3. 1-slot PCI-E 1X to 4 slot 1X riser card with high speed USB 3.0 cable.4. High speed USB 3.0 shield cable is flexible for 1U,2U,3U chassis.5. Support 4 port high speed PCIe 1X card.6. Solid capacitor provide extra stable power supply for PCI-e cardInstructions: If you need more than one PCI-E x1 slot on the motherboard was not any so much, it touches you can think about it. It consists of two parts, one main card, interfaceinstalled via PCI-E X1 on the motherboard, two equipment cards, both of which are connected together via USB 3.0 cable.The device card also uses the United States Pericom Pericom PI7C9X bridge chip, for switching PCI-E, PCI-E between.But even USB 3.0, but also the theoretical bandwidth 5Gbps (625MB / s), one Into four Then remove the loss would only 150MB / s, and even PCI-E 1.x single-channelbandwidth also has 250MB / s, So this stuff more than enough to give you the best slots, there will not be enough bandwidth, not only for the performance requirements of the place. Therefore, the transferred PCI-E slot is the best version above 2.0, the 3.0 version is better.Several Divided PCI-E 1X slot all is gen2 mode, even if gen1 previously ,it can be ok.Specifications:1. Power Connector: usb 3.0 power cable2. Mainboard size:(L*W*H)9.70*6.30*1.30cm/3.82 inch*2.48 inch*0.51 inch3.PCI-E Card size:(L*W*H)11.90*6.60*1.90cm/4.69 inch*2.60 inch*0.75 inch4.USB cable length 0.6m/1.8ftColour:blueMaterial:plasticPackage Contents:1 x 1 to 4 Mining Board Adapter1 x PCI-E 1X Riser Card1 x USB 3.0 CableOnly 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.