Dell AD211 User Manual page 13

NFC (Near Field Communication) Pairing
Your speaker supports NFC-enabled devices for quick and convenient tap to pair
functionality.
1
Make sure the device to be paired supports NFC.
2
Power on your speaker.
3
Place your NFC-enabled device on top of the NFC logo on the speaker to
start pairing.
4
Accept the pairing on your NFC-enabled device.