NFC (Near Field Communication) is a short-range communication that requires devices be within a few centimetres of one another to communicate. If your device supports NFC, you can easily pair it with the headphones:
Pairing your Bluetooth® device with NFC
With your headphones powered on, unlock your device and turn on the Bluetooth® and NFC features. Refer to the owner's guide for your device to learn more about these features
Once paired, you hear “Connected to <device name>” and the Bluetooth indicator on the right earpiece glows solid white