LG TONE-FP8W Owner's Manual page 11

Wearing Earbuds
1 Separate the earbuds from the charging case and adjust them so that
they fit comfortably in your ears.
You can use ear gels that fit your ears to improve
NOTE:
Active Noise Canceling (ANC) performance and enjoy
rich music sound.
2 When you wear the earbuds, you will hear a wearing detection alarm.
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