Instructions for commonly-used
functions
1. Screenshot
Use 3 fingers to swipe down the screen. Or hold the power button and volume-
button together to get a screenshot.
Where does the screenshot store: FiiO M21\Files\Internal
storage\Pictures\Screenshots
2. USB Audio digital output
The M21 supports USB audio. The setting steps are as follows.
1. Enable ""USB output"" in FiiO Music app of the M21.
2.Use an OTG cable to connect the M21 and the external decoder.
3.Open FiiO Music app or other music applications to use the M21 as a USB
digital output device.
It supports most of the decoding devices on the market. For those unsupported,
you can turn off the USB output in FiiO Music app, or unplug and re-plug the
USB device after quitting the FiiO Music app. If it does not work, please contact
us by sending an email to support@fiio.com for further help.
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