The renkforce usb 20 otg hub enables you to connect multiple usb devices to your smartphone or tablet you can use a usb mouse a usb keyboard and a usb memory card at the same time which allows you to view image file watch a movie or work on other sorts of documents and all that without needing access to a laptop or pcbuilt in memory card readerthe hub features a built in memory card reader allows you to access data stored on sd and micro sd cards up to 32 gb via mobile phonetablet pc