HumanTechnik RadioLight DIR Mode D'emploi page 21

Warranty
This warranty covers the repair of the product and returning it to you free of
charge. It is essential that you send in the product in its original packaging,
so do not throw the packaging away.
The warranty does not apply to damage caused by incorrect handling
or attempts to repair the unit by people who are not authorised to do so
(destruction of the seal on the unit).
Repairs under warranty are only carried out providing you have filled in and
returned the enclosed warranty card from the dealer.
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