Solidrock 3 in 1 Micro USB OTG Host Adapter SD Card Reader for Samsung Galaxy S4 S2 S3 Note 2 Tablet 3 in 1 Card reader , SD, Micro SD Transfer files to OTG , Allow you to connect to most USB Flash Drive, Mouse, Keyboard and some digital cameras etc. Supports Android 2.2 or newer version,Support external keyboard.. Compatible with Samsung Galaxy S3 , Galaxy Note 2, Galaxy S4 , Galaxy Note 3, Manufactured by Solidrock Everything has become easier with Solidrock.