Bose QUIETCOMFORT 45 - Wired Connections; Connect the Audio Cable

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ENG
WIRED CONNECTIONS
CONNECT THE AUDIO CABLE
Use the 2.5 mm to 3.5 mm cable to connect a non-wireless device or to continue using
the headphones if the battery is depleted.
1. Connect the cable into the 2.5 mm port on the left earcup.
2. Connect the other end of the cable into the 3.5 mm port on your device.
NOTE: You can use the headphones powered on or o when the the audio cable
is connected.