OTG USB HUB and Card Reader, Costech 7 in 1 Micro USB OTG Adapter HUB OTG SD/MS/M2/TF Card Reader,3 USB 2.0 Adapter HUB for Samsung Galaxy S3 S4 Note 2 Note 3 Note 4 (OTG USB HUB + Card Reader-1) This OTG Adapter HUB works for connecting OTG function. With this OTG HUB, you can connect your device to most USB Flash Drive, Mouse & Keyboard. It also works with external hard disk, please connect power source to this hub With MS,M2,SD(HC),TF Card Slot & 3 x USB 2.0 Port Compatible with all device which support OTG function