...
These microphones are recommended for use with I-Station & ICS panels only and these panels don’t have a screw-in collar. Therefore, the hex screw and allen key is not needed.
Clear-Com changed manufacturer of the GN-250 and GN-450 microphones. These are the same form, fit and function as their predecessors
NOTE
The GN microphone produces a higher output level than the GM microphones.
