Silvercrest SQWC A2 Operation And Safety Notes page 11

product has reached ambient temperature
before use
the product is never subjected to excessive
shocks and vibrations
the connected cables are always laid in such
a manner that nobody can step on or trip over
them. There is a risk of injury
no objects are placed on a connected cable
and cables are not connected over sharp edges
because this could otherwise damage the
functionality of sensitive electronics.
Changes or modification to this product not
expressly approved by the party responsible for
compliance could void the user's authority to
operate the product.
This product has been tested and complies with the
limits for a Class B digital device, pursuant to Part
15 of the FCC Rules.
These limits are designed to provide reasonable
protection against harmful interference in a
residential installation. This product generates,
uses and can radiate radio frequency energy
US-EN 11