The IRC-51 is the "Chairman's" tabletop
microphone used with the Azden 6-channel IR wireless conference
system. This microphone is always on channel #1. It features a push
ON /push OFF "talk" button as well as a "Mute" button that turns
all of the "Participant's" microphones OFF.
The IRC-51 can be powered by 6 "AA" Alkaline batteries or by 6 of
Azden's 1HR-3U rechargeable NiMH batteries, which can be charged
while in the unit. In fact, the microphone can be used while the
batteries are charging. Operating time on fresh batteries is
approximately 4-5 hours.