ETSI EN 301 489-9
ETSI EN 301 489-9
Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 9: Specific conditions for wireless microphones, similar Radio Frequency (RF) audio link equipment, cordless audio and in-ear monitoring devices
standard published 11/01/2001 by European Telecommunications Standards Institute