dodocool PCI-E Express Card, Dual USB 3.0 Ports Adapter Card Plug & Play Support Hot-swap [SuperSpeed USB 3.0] Support transfer rates up to 5Gbps, but the actual transmission speed is limited by the setting of the device connected. [Dual USB 3.0 Ports] Connects 2 USB3.0 devices simultaneously and downwards compatible with USB 2.0/1.1 [4PIN IDE/SATA Power Connector] Fits any PCI Express x1, x2, x4, x8 or x16 socket; US[4PIN IDE/SATA Power Connector] Fits any PCI Express x1, x2, x4, x8 or x16 socket; USB interface offers 5V/2A power supply to external devices.B interface offers 5V/2A power supply to external devices. [Wide Compatibility] Backwards compatible with USB 2.0 devices;supports simultaneous operation of multiple USB 3.0 and USB 2.0 devices [Seller Warranty] 30 Days Money Back Guarantee; 18 Months Replacement Warranty; Lifetime Product Support Guarantee; 100% Customer Satisfaction.