USB On-The-Go (OTG) is a standardized specification that allows a device to read data from a USB device without requiring a PC. The device basically becomes a USB host. You will need an OTG cable or OTG connector. You can do a lot with this. For example, you can connect devices to your phone, such as USB flash drives, digital cameras, mice or keyboards. The easiest way to check if your phone or tablet supports USB OTG is to look at the box it came in, or the manufacturers website. Youll see USB OTG listed in the specifications.