Complies with USB2.0 specification. Supports data transfer rate of high speed (480Mbps), full speed (12Mbps) and low speed (1.5Mbps). Supports plug and play and hot –plug features, allowing you to connect or detach device without the need to switch off the laptop or desktop PC. USB (Type-A Male) Host interface for connecting to laptop or desktop PC. Support all USB Based ExpressCard/34 or ExpressCard/34 or ExpressCard/54 devices. No external power required. Optional DC 5V Power Jack is also available if extra power is required. Built-in LED indicators for Power and Card inserted. Driverless: this device is transparent to operating system, only the driver for the USB Based ExpressCard device is required.