This unit is a Professional Wall Contact Microphone device, designed to listen through
walls and virtually any other surface including windows, concrete, steel, floors
etc. This device is ideal when access to the targeted premises is difficult or impossible.
Search & Rescue: Hear people trapped in basements, elevators, under rubble etc.
Bomb Detection: Listen to packages to indicate a ticking clock.
Diagnostics: Find problems in engines, transmissions and other mechanical apparatus.
Pest Control: Find location of insect or rodent infestations, active termite colonies
in walls, ceilings and floors.
Plumbing: Find locations of leaking pipes in concrete or walls.
Amplifier Unit – 85mm X 54mm
Mic. – 29mm Dia. X 20mm Ht.
Amplifier Unit – 145g
Mic. – 57g
9 Volt battery X 1
55-60 hrs (alkaline)
Input & Output:
Mic. input 3.5mm Mono Jack
Earphone Output 3.5mm Stereo.
Professional Listen Through Wall Device. (NAD FX-3)
The device uses a high gain extremely sensitive ceramic microphone made from stainless
steel. The sensor has a magnetic base with a central protruding needle connected
to the ceramic sensor and converts the vibrations into electrical audio signals,
these audio signals are then amplified so that they can be heard. It also incorporates
an audio filter control adjustment allowing the enhancement or rejection of different