This otg card reader lets you quickly mount sd and microsd cards to your otg enabled tablet or smartphone the card reader is compatible with any otg enabled mobile device such as the samsung galaxy sony xperia htc mobile devices and other micro usb equipped tablets and smartphones the otg card reader features a sleek design that mounts directly to the micro usb port on your smartphone or tablet this design has no dongle or cable ensuring the attached card reader won39t drag or hinder the way y