A perfect blend of integration and modularity; the face mask contains only a long-range communication gooseneck speaker, without batteries or circuitry, allowing for complete washing and easy replacement without re-pairing; the air supply valve features an ambient air bypass function and integrates a pressure head-up display; the back frame assembly integrates a central control system, power supply system, emergency power supply system, and audible and visual alarm system, with three adjustable stretch levels;