Lg Tone Free App - LG TONE-NP3 Owner's Manual

If a device that is not in use goes out of communication range when
multiple devices are connected, the product vibrates and a voice
message indicates that the connection is lost. In this case, the automatic
reconnection function is not supported.

LG TONE Free App

If you install "LG TONE Free," app, you can use Check headset Battery,
Change Equalizer Mode, Voice Alert, and Vibration Alert. Check out the
app for more details.
To install the "LG TONE Free" app, search LG TONE Free in the Google Play
Store or App Store or scan the QR code below.
It supports Android 7.0 and higher or iOS 11 and higher.
In case of multiple connection, you can run the app with only one or either
one of smartphones.
Google Play App Store
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