T'nB Micro USB OTG to USB-A 2.1 Adaptor (Ref: ADAMUSB1) The adapter Micro USB to USB 2.1 lets you connect a USB device to your tablet or smartphone equipped with a micro USB port. Very practical for connecting a real keyboard, mouse, USB key … It will quickly become a small indispensable accessory! Compatible Samsung Galaxy S2 / S3 / S4 note / note 2 and all smartphones and tablets with micro USB Host OTG port. Features Compatibility: USB-A 2.0 Characteristics: Micro USB OTG Connectivity: Micro USB