The Marine Sound-Powered Telephone is an essential, fail-safe communication device for ships and offshore installations. It operates without external power, generating clear voice transmission solely through the speaker's voice energy. This ensures absolute reliability during emergencies or main power failure. Built with robust, corrosion-resistant materials, it withstands harsh marine environments like salt spray and humidity. Its simple design guarantees intuitive operation and minimal maintenance, making it a critical backup system for engine rooms, bridge wings, and other key stations to ensure uninterrupted crew communication and enhanced maritime safety.