F999B is a high-sensitivity next-door spy listening device.Composed of metal receiver and high penatrating detecting

metal receiver and high-quality earphone, bringing out the best bugging effects.Built in Lithium battery.Unique FM

transmitting function.Highly portable and easy to operate.Essential equipment to collect evidence.This next-door wiretap

signal can penatrate concrete walls, wood walls, iron walls, glass or air bricks, can be used for doors and windows, wall

plate, wall plate and so on audio bugging

Features:
F999B is a high-sensitivity next-door spy listening device.

Composed of metal receiver and high penatrating detecting metal receiver and high-quality earphone, bringing out the

best bugging effects.

Unique FM transmitting function

 Highly portable and easy to operate.

 Essential equipment to collect evidence

Specification:
 Current Consumption:  10mA 
 
 Battery:  3.7V lithium battery 
 
 Four-band Frequency: A (200Hz), B(800Hz), C(1200Hz), D(probe bugging) 
 
 Probe Sensitivity: -70db 
 
 Maximum Audio Magnification: 20, 000 times 
 
 Listening Ways:  Earphone, records, wireless FM transmitting 

 Penetrability: Cement wall, Steel wall, wooden wall, iron wall, glass and air brick

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, F-999B 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.

 
Package Including
1* Main Unit

1* Charger

1* Detector

1* Probe

1* Earphone

1*Antenna

1* User Manual