Silvercrest SBL TW3 A1 Operation And Safety Notes page 18

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
and, if not installed and used in accordance with
the instructions, may cause harmful interference
to radio communications . However, there is no
guarantee that interference will not occur in
a particular installation . If this product causes
harmful interference to radio or television
reception, which can be determined by turning
the product off and on, the user is encouraged to
try and correct the interference by one or more
of the following measures:
18 US-EN