

High Sensitive Wall Contact Microphone
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High Sensitive Wall Contact Microphone,
Cement wall, Steel wall, wooden wall,
iron wall, glass
Description:
F-999B is a high sensitive partition monitor, which is perfectly constituted by
metal receiver, metal handset with superior detecting ability and high-quality
headphones, making it more sensitive and sound-qualified. It owns built-in
Lithium battery and unique FM transmitter function, easy to be manipulated and carried
Usage
Put the earplug into headphone hole, the sonde into the MIC hole, and
clockwise rotate the “switch on/off” button of the volume. When the indicator
light of the power works, booth the machine and adjust the volume, smoothly
stick the sonde to wall the need to be monitored, adjust the gear-choice buttons
A B C until you can clearly hear the sound from the room.
If you need to do the sound recording, you can use recording equipments to
go through the mouth of the recoding to connect the audio cable for recording.
Also, it has another special FM wireless emission function, with specialized
FM receiver which can receive the information afar and monitor that.
Cautions
The indicator light works when it is charging please shutdown in case of
damaging the machine. It needs to charge for about five hours. The sonde
must smoothly stick to the wall’s surface; never move the sonde when you
are sticking it to the wall in case of damaging the sonde. The effect of the
monitoring depends on the thickness, materials and other features of the
wall. Appropriately adjust the gear-choice button until you can get the best
effect of monitoring. D is the partition monitoring bougie of the sonde is
the refined part which should not be dismantled or touched discretionarily.
Parameter
Electric Current Exhaust: 10mA
Battery type: 3.7V lithium-battery
Continuous monitoring for 100hours
Four Audio Choices: A (200MHz) B (800MHz) C (1200MHz)
D (partition bougie monitoring)
Sonde’s sensitivity: -70db, the maximum times of amplifying the
audio: 2000 times
Penetrability: Cement wall, Steel wall, wooden wall, iron wall, glass
and air brick
Answering patterns: Headphones, recoding, wireless FM emission
Alle manualer er Engelsk