This otg cable white works is very simple. Any portable device such as a mobile phone acts as a host allowing a keyboard, camera, printer or almost any portable device to attach itself to it and initiate communication. This cable is made from high-quality material and is extremely durable, thus you do not need to worry about a break in the cable. The best part about this device is that it is compact and takes up the least amount of space enabling you to fit it in a purse or bag. So now you can transfer your files on-the-go with the help of the callmate usb otg cable for tablets and mobiles. Usb on-the-go, often abbreviated to usb otg or just otg, is a specification first used in late 2001 that allows usb devices, such as tablets or smartphones, to act as a host, allowing other usb devices, such as usb flash drives, digital cameras, mice or keyboards, to be attached to them.