The necessary energy to establish communication comes only from the user´s voice. The acoustic energy is transformed to electrical, and then from electrical to acoustic.
All of our sound powered telephones are built with polymer alloy providing high impact resistance, fireproof, stability to ultra-violet light and excellent chemical resistance.
These types of telephones are used when security in communication is of vital importance, as is the case of the combat systems in military vessels. Our sound powered telephone systems comply with MIL-STD.