Earphone Removal; Use While Exercising; Use While Traveling - Meelectronics M-Duo User Manual

Earphone Removal

DO NOT REMOVE FROM YOUR EAR BY PULLING ON THE CABLE!
Gently wiggle the earphone before removal to break the seal. Pull the
earpiece straight out of your ear and then unwrap the cable from over
your ears, if necessary. Place the earphone in a safe place such as
the included carrying case when not in use.

Use While Exercising

Using the over-the-ear wear style will improve the security of the fit for
working out. Exposing the nozzle to sweat may degrade the sound
quality in the long term and is not warrantable.
Please do not use earphones when performing exercise that requires
you to hear your surroundings, such as cycling or running outdoors.
Use While Traveling with Altitude
Changes (Airplane/Car/Train/etc.)
During large, rapid changes in altitude you may experience pressure
changes which can affect the way your earphones sound.
It is recommended that you release pressure or break the seal when
you feel increased pressure due to altitude changes to maintain the
best sound quality. You can release pressure by pulling the housing
back very slightly which will release pressure but not break the seal.
To break the seal, pull the ear tip out of your ear canal slightly and
then re-seal.