LG TONE Free TONE-DFP9 Owner's Manual page 19

3 Connect the USB Type C™ side of the USB-C™ to AUX cable to the
charging case. (The USB-C™ to AUX cable does not support the
charging function.)
4 Connect the AUX side of the USB-C™ to AUX cable to a device that
you want.
NOTE: Deactivate the Plug and Wireless Mode to reconnect the
earbuds to the Bluetooth device that was previously connected.
If the Plug and Wireless Mode is turned on, the earbuds and the
LG TONE Free app are disconnected.
The Plug and Wireless mode does not support the call function.
The Plug and Wireless mode may not be compatible with some
devices. In airplane models in which the AUX terminal is divided
into left and right channels, an adapter (separately sold) may be
necessary.
If you use the Plug and Wireless mode for a long duration, the
battery of the earbuds (including the charging case) may drain
faster than when physically connected to a smartphone.
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