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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/IRR-30/IRR-30P 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 1HR-3U only) the microphone can be used the
entire school day without re-charging or changing batteries.
Technical Specs:
Sub-carrier frequencies: 2.06MHz
Modulation:FM
Microphone element type: Uni-directional electret x 2
Frequency response: 50-9kHz ±3dB
Ext Mic input imped.: 2.2k Ω
Ext Mic input jack: 3.5mm
Ext. Mic Voltage/Current: 3.5VDC @ 1mA
Mic gain adjustment: +6dB to approx. –10dB
Battery type: 1-"AA" Alkaline (1.5V) or 1-1HR-3U "AA"
rechargeable Ni-MH (1.2V)
Battery life: > 8hours w/alkaline batteries
Size: 95 x 25 x 50mm
Weight: 74g inc./battery
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