USB On-The-Go is a really useful USB specification! It allows some small devices that would usually be unable to act as a host to have limited hosting capabilities! USB-OTG is common for things like tablet computers and smartphones in order to allow for USB peripherals like flash-drives, keyboards, etc. to be hooked up.
If you have a USB OTG device, you need one of these Female A to Micro-A cables to act as a host. Remember, not all devices are USB-OTG compatible, so make sure that whatever you're plugging in actually has this ability so you don't damage something!
Note: This cable will NOT work with a Raspberry Pi Zero. This cable is not compatible with every OTG device. We suggest this part for the IOIO OTG, however, you will want to ensure it fits your device before purchase.
Dimensions: 4" long