Female USB & Male USB 2in1. So you can connect Android phone with USB flash disk, printer, game controllers, mouse, keyboard, digital camera, and so on. (Note: iPhone excluded)
One cable with two kinds of connectors, so whether you are using Android smart phone or iPhone, this USB OTG Cable can charge both. Moreover, you can use your android phone to charge another phone with this cable. Amazing!

1) The OTG connector has been tested 15000 times. 
2) The interface between the connector and cable can be bend 15000 times. Other USB cables only 3000 times. 
3) The micro hook can be used 15000 times.