Beyerdynamic Blue BYRD Mode D'emploi page 14

FCC / IC Regulation
CAUTION
Changes or modifications not expressly approved by the
manufacturer responsible for compliance could void the
user's authority to operate the equipment.
Made in China
This device is granted pursuant to the Japanese Radio
Law (電波法) and the Japanese Telecommunications
Business Law (電気通信事業法).
This device should not be modified (otherwise the
granted designation number will become invalid).
14/14 Blue BYRD