Sony Xperia1 IV User Manual page 279

Users with heart conditions should adjust vibration and ringtone volume as needed.
Handset suddenly vibrating and ringing for a new call may startle and affect persons with heart
conditions.
When using electric medical equipment, etc., check with the equipment vendor or distributor
for information about the effects of radio waves.
Handset radio waves may affect electronic medical equipment.
If Display, Back Cover, or Camera lens is broken, do not touch the broken components or
exposed inside of handset.
Touching the broken or exposed part may cause burns, injury, electric shock, etc.
If Internal Battery leaks or has an unusual smell, immediately stop using, and keep away from
fire.
The leaked fluid may catch on fire causing ignition, explosion, etc.
Do not allow a pet, etc. to bite handset.
Internal Battery may ignite, explode, overheat, or leak causing fire, burns, injury, etc.
When using the motion sensor, ensure the safety of the surroundings and hold handset firmly,
not swinging around more than necessary.
Failure to do so may cause accidents such as injury.
If Display is broken, do not allow the leaked internal substance to contact the skin of your
face or hands, or clothes.
May cause injury to eyes, skin, etc.
If the internal substance gets into your eyes, mouth, etc., or contacts your skin or clothes,
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Safety Precautions