Sony Xperia1 IV User Manual page 274

Do not allow liquids such as water (drinking water, sweat, sea water, urine of pets, etc.) to
come into Charging Terminals or USB Type-C Port/Headset Jack.
May cause fire, burns, injury, electric shock, etc.
For water resistance, see "Water Resistance/Dustproofing."
Use optional accessories specified by SoftBank.
Using unspecified accessories or those of unknown manufacture, origin, or specification may cause
fire, burns, injury, electric shock, etc.
Do not drop, stomp, throw, or otherwise subject to strong force, impact, or vibration.
May cause fire, burns, injury, electric shock, etc.
Do not allow Charging Terminals or USB Type-C Port/ Headset Jack to contact conductive
materials (metal parts, pencil leads, etc.), or do not allow dust to enter inside.
May cause fire, burns, injury, electric shock, etc.
Do not cover or wrap with bedding or other cloths while using or charging.
May cause fire, burns, etc.
Do not adhere anything metal (stickers containing metal material, etc.) to a wireless charger
(commercially available) or handset.
May cause fire, burns, injury, etc.
Do not place anything metal (straps or clips containing metal material, etc.) between a
wireless charger (commercially available) and handset.
May cause fire, burns, injury, etc.
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Safety Precautions