Simply register your Audiophilleo product to extend the limited warranty
from the standard 90 days to 1 full year.
You will find the serial number either on the printed insert inside the box, or on the serial number sticker on the device.
The Audiophilleo1 also displays the serial number in the "Firmware->About" screen. The format will either be "12345", "1-12345" or "2-12345".
All are valid. For the Audiophilleo2, see
locate the serial number
After entering and validating your e-mail, prove that you're a human being
by solving the equation outlined in green (for example: 5001 + 5 - 1 = 5005) and putting the result in the box.
For Example: 5001 + 5 - 1 = 5005