1: You can find the 15-digit serial number on the barcode sticker on the external package.

2: The second way to find serial number is to check the product package.

3: Alternatively, you can unscrew the round, white cover on the back of the hair dryer and find the unit's serial number on the sticker on the back of the cover, or scan the QR code on the same sticker to pull it up directly on your phone and easily copy and paste it.