The full name of NFC is Near Field Communication, which is a technology for short-distance communication. One of the original purposes of NFC is to enable mobile phones and some mobile devices to realize the function of IC cards, so as to realize card payment through mobile phones.

The application of NFC technology in Bluetooth audio products is mainly used for quick pairing. The exchange of device information and authentication data can be completed between the audio product and the mobile phone with a light touch, and the audio device will also be turned off from the off state. In fact, this is a safe and simple pairing application of NFC combined with Bluetooth. In the whole process, NFC is not a connection method, it plays a guiding role, and the actual transmission is still Bluetooth.

When pairing with NFC for the first time, neither the mobile phone nor the audio device may respond, and the pairing cannot be completed, usually because the NFC sensing areas of the two devices are not aligned. When performing NFC fast pairing, it is necessary to roughly overlap the sensing area of the mobile phone and the sensing area of the audio device to complete the pairing. This is somewhat similar to the characteristics of the IC card, and this is also a small shortcoming of the NFC fast connection. In order to prevent users from finding the sensing area, manufacturers usually mark the sensing area on the surface of the device.