Fiio M11 Plus, Complete User'S Manual, Page: 9 / 100

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3) Play/Pause: short press it when music is playing to pause the music; short
press it when music is paused to resume the playback.
4) Volume up/down: press the volume up button to increase the volume, press
the volume down button to decrease the volume.
5) Volume touch panel: slide up on the touch panel to increase the volume; slide
down on the touch panel to decrease the volume.
6) Previous track: short press to play the previous track; long press to rewind.
7) Next track: short press to play the next track; long press to fastforward.
8) TF card slot: supports one TF card (micro SD card), theoretically up to 2TB
expansion.
9) USB Type C transfer/charging port: used for charging, data transmission and
USB Audio. It is recommended to use a QC3.0 or above power supply adapter,
which needs at least 3.5 hours for a full charge.
10) 4.4mm balanced output: supports 4.4mm balanced headphone/line-out
output.
11) 2.5mm balanced output: supports 2.5mm balanced headphone output.
12) 3.5mm headphone/line-out/SPDIF output: shared outputs of line-out and
PO. Go to the menu of Settings->Audio->Output selection to switch to
corresponding modes.