• Over the Head, Single-Ear Wired Headset
  • PTT Radio Transmit
  • Extended-range operating temperature: -40°F to +158°F
  • Glove-rugged plug : Ergonomic connector is easy to grasp with a gloved hand and swivels to distribute strain at the jack connection
  • Description
  • Features
  • Specifications
  • Documents

The Firecom FH-51S wired headset delivers all the benefits of hands-free, full-duplex communication with your crew. Operating with a stand-alone intercom system or integrated with a mobile radio, the flexible design brings all crew members into constant communication. Broad padded headband remains comfortable for hours of wear. Water-resistant and comfortable ear seals, extended operating temperature, and robust design make this headset ready for action in virtually any fireground environment. This single-dome headset does not provide complete hearing protection.

State-of-the-art ear and hearing protection

  • ComLeather over memory foam ear seals for hours of comfortable use
  • Enhanced durability and comfort, designed to fit any head size
  • IP65 rating for dust/water protection when worn

Enhanced microphone

  • Flexible mic. boom with slide adjustment for accurate/secure positioning
  • Microphone boom rotates for left or right dress
  • Noise-cancelling electret microphone ensures optimal clarity
  • Microphone protected by a layer of Water-resistant material for outdoor use
  • Microphone muff improves clarity by eliminating wind noise

Total configurability

  • Full duplex intercom plus listen-only radio in intercom mode
  • Communicates over radio with push-and-hold transmit button
  • PTT button requires solid push, eliminating accidental transmissions
  • Fully programmable to user specifications

Simple maintenance

  • Black dome for easy cleaning
  • Black powder-coated headband for durability
  • Glove-rugged plug for longer life


  • Weight: 19 oz.
  • Color: Black


  • IP-65 rated, when worn
  • Operating temperature -40°F (-40°C) to +158°F (+70°C)
  • Storage temperature -40°F (-40°C) to +185°F (+85°C)
  • Charging Temperature 32°F (0°C) to +104°F (+40°C)


Salt Spray per J1455, Sec. 4.3


  • Humidity per MIL-STD 810F and 810G
  • Temperature Shock per MIL-STD 810F and 810G
  • Chemical Exposure per MIL-STD 810F and 810G


  • Conducted Transients per 7637-2

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