are to be extended, a four conductor cable, having two shielded conductors for the microphone, should be used. The modular construction of these microphones allow the cartridge, switch, and cable to be replaced in a matter of minutes, if necessary. They fit naturally and comfortably in the hand and are not adversely affected by heat or humidity. The ARMO DUR case is immune to oil, grease, fumes, salt spray, sun, rust and corrosion, and is outstanding in its ability to withstand mechanical shocks and vibration. The Million Cycle leaf type switch is double pole, single throw, designed to withstand severe operating conditions and constant usage. Frequency response from 200 to 5,000 Hz, tailored for voice communications Low sensitivity to hum Low susceptibility to radio frequency interference Million Cycle leaf type switch stands up under severe operating conditions and constant use High impact ARMO DUR case lighter and stronger than die cast metal, comfortable to the touch in hot or cold weather Rugged and dependable under all operating conditions Long life neoprene jacketed coil cord
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