A lightweight, handheld
microphone/transmitter, the sleek IRN-30 is both a microphone and
infrared transmitter that wirelessly “links” the
teacher to the IRR-40P receiver. The IRN-30 microphone 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.