Key equipment of sound-powered communication systems, FACTEM manufactures intercoms sets designed for harsh environments, they works only with the energy generated by the voice (without battery, without power supply).
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Calling howler : On the handset
Color : Medium gray / black
Connecting via screw terminal
Drop resistant : Yes
Earphone(s) : A47421 self-generating cell
Howler: no
Microphone: A47421 self-generating cell
Number of directions: 1
Operating temperature -40°C to +55°C
RoHS compliant : Yes
Salt fog and mist resistant : Yes
