5pcs Micro USB to USB2.0 OTG Expansion Adapter, Bolayu For Cell Phone Android Black Micro USB Male to USB 2.0 OTG Female. Let your smart phone to be USB port functional enabled. Operate your smart phone easier by connecting USB keyboard / USB mouse. Synchronize data(files, pictures, video, music) with your USB flash disk, USB card reader, mobile phone. OTG adapter provided you a direct and convenient way to share data, files, video, audio between two digital devices, such as mobile phone and tablet.