Communication headset for integration in MSA Gallet F1XF fire helmet • One or two loudspeakers, in plastic housing with mounting clips. • Flexible microphone, adjustable in length (80 mm) to optimize position in front of the mouth or the speech diaphragm (BA face piece) • Downlead Cable with anti-tearing, LEMO connecting plug (green cover). Operates with an MSA Push-to-Talk (PTT) module enabling connection to the PMR radio. Connection through an anti-tearing LEMO plug with color codification. • PTT module with Yellow connector: non ATEX system • PTT module with Green connector: ATEX system (for use with approved ATEX radios only) Microphone: • Noise cancelling Electret, 100Hz-10kHz, distortion < 3% • Loudspeaker: 32 Ω, 20 Hz – 3 kHz, max power 100 mW • Amplifier: adjustable gain (0 to 26 dB), 300 Hz – 3 kHz Nominal output 50 mV RMS, Harmonic distortion 5% • Down lead Cable: Fire retardant, shielded cable • Housing: Polyamide (PA6), Fire resistant (V0) • Operation Temperature: -20°C to +65°C, humidity < 98% Approvals: • EMC performance: ESD/EMI: 10 V/m • Ingress Protection testing: IP56 (tested inside the helmet) • ATEX (when used with an ATEX certified PTT module) • ATEX level: II 2G Ex ia IIC T4 Connection with a wide range of brand and types of radios is possible.