A lightweight, chest worn,
microphone/transmitter, the IRN-20 comes with an adjustable
lanyard. It is both a microphone and infrared transmitter that
wirelessly “links” the teacher to the IRR-40P receiver.
When used with the IRR-40P you can adjust system volume right from
the IRN-20 itself for ultimate flexibility. The IRN-20 also has a
specially designed internal microphone array that provides great
sound pick-up. With just one “AA” battery (Alkaline or
rechargeable) the microphone can be used the entire school day
without re-charging or changing batteries.