USB interface expanded to three, small, practical and convenient, expand three 2.0 USB interface, each power supply topped 500MA. Adopts second-generation ports on controller. Directly with computer connected, without external power supply, simple to use. Computer automatic identification installation, beardless driver, plug and play, inserted. USB2.0 interface, support USB1.0/1.1, transmission speeds 1.5/12/480MBPS. Built-in current over-load short-circuit protection device.USB 2.0 plug-and-play. USB 2.0 x 3. Support CARDS such MS/Pro Duo, M2, the SD/skillfully, Micro SD.WITH OTG/USB 2.0 HUB And Smart Connection. This is a cool attachment for micro USB OTG as well as sd card reader with male and female USB Support. Now plug in the card reader directly into your Phone. This device works only with OTG supported Mobiles. Please check your device support OTG to successfully use this Device. Note : SD card reader only and your phone should support OTG functionality.