F999B Super Sensitive Listen Through Wall / Door / Window Microphone & Amplifier
$146.00Original price was: $146.00.$120.00Current price is: $120.00.
–High-strength wall-mounted microphone voice hearing detector, suitable for for maintenance projects such as wooden walls, doors, windows, and steel plates. –Monitoring mode, headphone jack, external speakers –Highly sensitive, adjust the audio carefully and slowly so as not to cause discomfort to the headset.This audio device works by amplifying the vibrations of the audio. –The high-sensitivity sensor head adopts new components and advanced technology to increase the penetration by several times, and the sound quality is greatly improved. –Effectively filter noise. Adopt advanced technology to effectively filter noise and detect water outlet faster. –When people speak in a room, their voice is just a band that travels short and long distances, depending on how loudly they speak, and is picked up and amplified by the device. –This product is sold as an investigative tool to law enforcement or licensed investigators.
1.Features:
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
2.Usage:
Put the earplug into headphone hole, the sounder 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 sounder 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 equipment’s to go through the mouth of the recording to connect the audio cable for recording. Also, F-999B has another special FM wireless emission function, with specialized FM receiver which can receive the information afar and monitor that.
3.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 sounder must smoothly stick to the wall`s surface; never move the sounder when you are sticking it to the wall in case of damaging the sounder. 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 boogie of the sounder is the refined part which should not be dismantled or touched discretionary.
4.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 boogie monitoring)
Sounder`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, recording, wireless FM emission
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