Bose QuietComfort Ultra Wireless Noise Canceling Over-Ear Headphones (White Smoke) - Manual (Page 34)

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WIRED CONNECTIONS
CONNECT THE USB CABLE
Use the USB cable to connect to an external power source and continue using the
headphones if the battery is depleted or to charge the headphone battery
(see page 35).
NOTES:
• The headphones won’t charge when they are on your head, powered on, and
connected to an external power source.
• 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.
3. Power on the headphones (see page 14).