Card Reader: Supports many differences type of memory cards in the market. It is designed for those who need the conveniece and moblity to read and write the most popular memory cards. 3 Ports USB 2.0 HUBS: Transfer rate up to 480Mbps. Fully compatible with USB 2.0 or 1.1 peripheral products. support hot plug and pla, connect and remove peripherals at any time. Use both USB connectors of power cable to increase power for your connected equipment from 500mA to 1000mA.