A small modern chip that uses NFC technology. NFC enables wireless communication between multiple devices. The NFC tag does not require a power source and has many uses. In virtual reality, it is commonly used as a “trigger” of sorts for some phone settings. If you touch the tag (located, for example, on your VR headset) with your smartphone, it activates a special VR mode, which mutes the ringtone, turns off vibration, or raises brightness. By touching the tag you tell the smartphone that you are going to use VR, so it automatically adjusts the right settings.