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 ccan be charged
while in the unit. In faact, the microphone can be used while the
batteries are charging. Operating time on fresh batteries is
approximately 4-5 hours.