This is a cable that allows your android phone to become a usb host that can read data from a usb peripheral device like a flash drive, pointing device, external hardisk etc. but in this case you will use it to create a usb connection between your android phone and your fingerprint scanner / reader.. I plan to do an attendance management system app for lecturers, where i plan to connect a usb fingerprint scanner to the (lecturers) android phone/ tablet with android version 2.3 and above..using a mini usb otg to usb 2.0 connector.. Ver m