USB 3.0 HUB 4 ports front panel to motherboard 20pin connection cable for 5.25 inch CD-ROM slot. Integrated GL3520 chipset. USB 3.0 specification USB 3.0 interface and 5.5 inch PC front panel bay Compatible with USB 3.0 Super Speed (5Gbps), USB 2.0 Hi-Speed (480Mbps), USB 1.1 Low Speed ( 1.5M bps). Max. 900mA per port