LG TONE Free Owner's Manual page 6

This product is waterproof to the IPX4 level (daily life waterproof).
(The IPX4 waterproof rating applies to the earbud product only.)
Do not put the product under the water or use it in a humid location such
as a bathroom.
! CAUTION
Do not disassemble, adjust, or repair the product arbitrarily.
Do not place the product near excessive heat or flammable material.
The product may be damaged if an incompatible charger is used.
Make sure that an infant or child does not swallow a magnet or a small
component of the product.
Make sure that foreign objects do not enter the charger's connectors
(charging port and power plug). Failure to do so may result in fire or
electric shock.
If you have a medical device implanted, contact your doctor before using
this device.
This product has a built-in battery, and the battery cannot be removed or
replaced arbitrarily.
For your safety, do not remove the battery incorporated in the product.
If you arbitrarily replace the battery or don't replace it correctly, it may
explode.
The lithium-ion battery is a hazardous component that can cause injury.
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