Sound powered telephones are also used in many commercial/industrial locations such as: airports, fire and police rescue crews, public utilities, schools, vaults, refrigeration plants, civil defense, bridge installations, ski slopes, oil fields, parks and forest, railroads, salvage yards, sporting arenas, shipyards, diving projects and geophysical operations where power is not available. Audio communications can be transmitted over 1 mile.

Sound powered telephone equipment is explosion proof making it ideal for arsenals and powder works, gas works, chemical plants, oil refineries, mines and quarries, ballistic missile sites and nuclear installations.

Lightweight and portable, the equipment is comfortably used for in-plant and outside maintenance, construction and repair; electrical contract installations, public utilities, radio, television, telephone installations and shipboard operations.