What is USB OTG and how is OTG used for?

OTG(USB OTG) is the abbreviation of On The Go adapter (sometimes called an OTG cable, or OTG connector) which means that you can play audio and video files anywhere without PC. You don't need to copy the files to the player but to share another memory with one connection. 

OTG is mainly used in the connection between various devices or mobile devices for data exchange. Our computers use USB ports and USB data cables to connect with various mobile peripheral devices to transfer data. If there was no computer, data transmission cannot be carried out in your mobile phones or tablets. 

At this time, OTG interface and OTG cable then came into being, mobile phones and tablet computers with OTG interface can use OTG cable to connect with USB, keyboard, mouse and other peripheral products and transmit data. In this way, the connection and data transmission between mobile devices can be carried out without a computer, which also enables mobile devices to have device expansion functions. For example, we can connect your mobile phone and printer or some other peripheral devices through USB OTG. Presently, we not only have simple OTG Adapter for lightning to USB3.0, USB C (Type C) to USB A 3.0, but also have 2 in 1 OTG Adapter with both USB 3.0 and lightning port, to support data transmission and charging at the same time,4 in 1 USB OTG Adapter with four USB ports for multi-devices connection.