Bose QUIETCOMFORT ULTRA Mode D'emploi page 34

CONNECT THE USB CABLE
If the headphone battery is depleted, you can use the USB cable to connect to an
external power source and still use the headphones.
NOTES:
• If powered on, the headphones power off and begin to charge when connected to
an external power source. To continue using the headphones, power them on again
(see page 14).
• The headphones won't charge while they're powered on.
• The headphones don't support USB audio. To play audio from a source device
connected as an external power source, connect using the Bluetooth menu on your
device (see page 27) or the audio cable (see page 33).
• To continue listening to audio on your source device when the headphone battery
is depleted and a Bluetooth connection isn't available, connect both the USB cable
and the audio cable (see page 33).
1. Connect the small end of the USB cable to the USB-C port on the left earcup.
2. Connect the other end to a USB-A power source such as a computer or
wall charger.
If powered on, the headphones power off and begin to charge.
3. Power on the headphones (see page 14).
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