BEEWIIN&trade; Universal OTG Micro USB 2.0 Host Flash Disk Adapter Converter For Android Or Windows Smart Phones Tablets With OTG Function (Black) Micro Adapter allows you to connect your phone or tablet with your standard Micro USB cable to achieve charging, sync and data transfer. Support for devices that support USB OTG functionality. Small form factor, easy to carry. plug and play, no external power supply. Easily back up essential files stored on your phone. Connect a thumb drive to your tablet or cell phone or eReader for removable data storage.