FiiO

The M21 supports external USB audio. The setting steps are as follows. 1.Enable "USB output" in the FIIO Music app on the M21. 2.Use an OTG cab...

1.Player Settings - Audio - 3.5mm output selection, set to SPDIF. 2.Connect one section of coaxial cable to the 3.5mm audio port of M21, and connect the o...

Fast charging protocols including PD2.0 or above are supported. If the power adapter does not support neither the above protocol, it will not trigger the f...

Select 3.5mm output mode:  switch the output mode of the multifunctional output port, with options for PO/LO/SPDIF. The default is PO. (When switching to ...

Sample rate display With it turned on, the sample rate of the currently playing song will be displayed. Dark theme With it turned on, the theme will swi...

1.System navigation Gesture, 2-button and 3-button navigation are available. 2.Tape mode theme Select the theme after entering Tape mode. 3.Multifuncti...

How to change the language on the M21? 1.Go to the menu of Settings->System->Languages and input->Languages. 2.Tap "Add a language" to...

Setting item Indicator Instruction Brightness Custom Brightness level 0-100 Adjustable Working state Constantly on Red indicator o...

After installing the tape case, the M21 will automatically enter tape mode.  You could also enable the tape mode from system setting-global-tape mode them...

How to use the FiiO Link Bluetooth function? There are mainly 3 steps. 1.On the FiiO Music app of the player, Settings->FiiO Link->┆ (on the upper r...