Features:1. 2 layer PCB bard designs: This product has 2 layer PCB bard designs, it is very practical.2. Highly compliant: This product is compliant with PCI express 2.0, 1.1 Specification.3. High speed: 1-slot PCI-E 1X to 4 slot 1X riser card with high speed USB 3.0 cable.4. Flexible: High speed USB 3.0 shield cable is flexible for 1U, 2U, 3U chassis. This product is flexible.5. Practical: Support 4 port high speed PCIe 1X card. 6. Solid capacitor provide extra stable power supply for PCI -E card.