Tronic TNMC 7.5A1 Operation And Safety Notes page 27

Never open the product. It has no internal parts requiring
maintenance.
The product must not be covered during operation, no
foreign objects may be introduced into the product, no
foreign objects may lie on the charging surface during
operation.
The product must not be charged at a PC or notebook due
to the high power consumption.
ATTENTION! Radio interference
Do not use the product on aeroplanes, in hospitals, service
rooms, or near medical electronic systems. The wireless
signals transmitted could impact the functionality of sensitive
electronics.
Keep the product at least 20 cm from pacemakers
or implantable cardioverter defibrillators, as the
electromagnetic radiation may impair the functionality of
pacemakers.
The radio waves transmitted could cause interference in
hearing aids.
Never use the product near flammable gases or potentially
explosives areas (e.g. paint shops), as the radio waves
emitted can cause explosions and fire.
The OWIM GmbH & Co KG is not responsible for
interference with radios or televisions due to unauthorised
modification of the product. The OWIM GmbH & Co KG
28 GB/IE