Sennheiser MK 4 Instruction Manual page 18

Manufacturer Declarations
This device complies with Part 15 of the FCC Rules and with
RSS-210 of Industry Canada. Operation is subject to the following
two conditions: (1) this device may not cause harmful inter-
ference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
This class B digital apparatus complies with the Canadian ICES-003
Cet appareil numérique de la classe B est conforme à la norme
NMB-003 du Canada
Changes or modifications made to this equipment not expressly
approved by Sennheiser electronic Corp. may void the FCC autho-
rization to operate this equipment.
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