Sony LSPX-S1 Help Manual page 23

The app may not be downloadable in some countries/regions.
Start "NFC Easy Connect" on the smartphone.
3
Make sure that the app screen is displayed.
Touch the speaker with the device.
4
Unlock the screen of the device beforehand.
Keep touching the device on the N marked part of the base until the device responds.
Follow the on-screen instructions to establish the connection.
When the BLUETOOTH connection is established, the BLUETOOTH indicator stays lit in white.
To disconnect, touch the N marked area with the device again.
Hint
If the speaker is off, it will turn on when the device touches it.
If you cannot establish a connection, try the following.
Start the app on the device and move the device slowly over the N marked area of the speaker.
If the device is in a case, remove the case.
If you touch a device to the speaker, the device terminates the BLUETOOTH connection with the current device (NFC-compatible headset, etc.),
and connects with the speaker (One-touch connection switching).
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