How To Use Mouse, Keyboard, Game Pad and USB Storage in your Android Smart Phone

Using USB On-The-Go you can do a Lot.

USB On-The-Go (OTG) is a specification first used in late 2001 that allows USB devices, to act as a host, allowing other USB devices, such as USB flash drives, digital cameras, mice or keyboards, to be attached to them. Traditionally mobile devices could only connect to a Mac/PC by USB, but USB OTG makes it possible for devices to connect directly to each other.

How can you use OTG on your smartphone or tablet?

1: Connect a MIDI keyboard

 

If you fancy making music on Android, USB OTG enables you to connect devices such as MIDI keyboards and controllers, audio inputs for instruments and vocals and various controllers that can turn your phone or tablet into a serious music-making machine.

2: Connect a USB storage drive

 

You can connect to storage devices such as USB sticks or external hard drives with USB OTG. Using a file manager on your device, you can directly access data on an external storage device and play movies or music without having to store them on your phone. 

3: Connect a game controller

 

Enjoy mobile gaming but yearn for a bit more control? Why not connect a gamepad to your smartphone? Using a wired Xbox 360 controller is an easy way to do this: just connect it to your phone with a USB OTG cable, launch a game and it should work right away, no configuration required.

4: Connect a mouse or keyboard

 

Just plug in a USB mouse and you will automatically see its cursor appear on your display. This is also a great way to use your device if the touchscreen is broken. Alternatively, connect an external keyboard to turn a tablet into a laptop.

5: Also you can Use OTG to charge phone with  another phone

SRC:wikipedia,androidpit