Cables:

• On the packaging
• Or the sticker on the cable

Earpads:

• On the packaging

Speaker units:

• On the packaging
• Or on the right speaker unit, QR code can be scanned by mobile phone or reading device.

Headbands:

• On the packing
• H10 with QR code that can scanned by mobile phone or reading device
• On the sticker on the cable   (for H01/02/03/04)
• On the top inner side of the headband with an NFC reader application (e.g. GoToTags, NFC reader, some mobile phone)   (for H01/02/03/04)
• For the H10 on the left side, QR code that can be scanned by mobile phone or reading device