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Changing the battery
To open battery compartment, press in the centre of the battery door with both thumbs and slide off.
The battery door is treated with a clear anti-slip finish to reduce the tendency to move when worn.
Pull on ribbon tab to release battery.
Rechargeable battery:
1 x 2700mAH high capacity rechargeable AA battery - exposed end.
This battery is fitted with is exposed metal end against the spring.
Position the battery on top of the ribbontab for easy removal next time.
Technical Note - when a battery is first inserted. the IRN-20 will
automatically test the battery to make sureit has enough charge.
The indicator will show orange for 5 secs while it is testing,
followed by green or red for 1sec.
Green - the battery has enough charge.
Red - the battery needs to be recharged.
A flickering indicator or no indiator - the battery has no charge and needs to be recharged or replaced.
Dual directional microphones
The IRN-20 uses tow separated microphones(Left and Right)to provide a constant
transmitted voice level as the user's head is turned from side to side.
The optimized dual microphone design also provides
ideal pick up of the user's voice and rejects unwanted
sounds in all other directions.
This means that you don't get variation of volume
as the speaker moves head from side to side.
Microphone gain settings
The IRN-20 microphone gain control is factory set and
will not need adjusting.
Remote volume control feature - for use with IRR-40/40P
When used with an IRR-40/40P, the IRN-20 can be used
to remotely adjust the channel volume.
The range of remote volume adjust is +/-15dB and allows the user
to temporarily adjust the volume of their voice from the IRR-40/40P.
A short press of the + or - button on the top of the transmitter will
increase or decrease the current volume by 1 dB.
Holding down the + or - button will charge the volume at the rate
of 4dB per second.
To reset the volume to the default manual setting on the IRR-40/40P
unit, press both the + and - buttons simultaneously.
The IRR-40/40P volume will reset itself to the manual setting when
the IRR-40 is turned off.
Note - the remote volume control function will only work with new IRR-40/40P models. Compatibility
with the remote control feature is indicated by the xx suffix.
IRN-20 Specifications
Sub-carrier frequencies 2.06MHz & 2.56MHz switchable
Modulation
Microphone type
Frequency response
Ext Mic input jack
FM
Uni-directional electret x 2
120-10kHz
Φ3.5mm
Microphone
Volume up
Volume reset
Ext power input jack Φ3.5mm
Battery type
Size
Weight
Microphone
Volume down
"AA" Battery (1.5V x 1)
95 (H) x 49 (W) x 26 (D)mm
79g w/battery
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