QC II earbuds serial number . In-Ear Hello reddit, I got a pair of QC II earbud from amazon. Its connected to the Bose Music app, software update done and seems smooth on iOS. I have 2 things that I need clarification for: First issue is I see that the serial number on the box, on the inside of the case and on the App seem to he different.. Check the headband for a 4-digit code. If you are unable to locate one, remove the cushion to reveal the 17-digit serial number on the earcup. If your headphones use a rechargeable battery, remove the battery and look inside the battery compartment.
Serial number location | Bose QuietComfort Ultra Earbuds. To view the serial number located inside the case cover: Hold the bottom third of the case cover. Open the earbuds case lid. Grasp the lid at the back (near the hinge) and at the front of the lid. Lift the earbuds case up and out of the case cover. The 17-digit serial number is located to the left of the USB-C connector.