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The FSII O2 2.4 GHz beltpack is specifically designed to work in Hyperbaric chambers safely, operating at atmospheric pressures of 5.1 atm, 517 kPa, or 75 psi with a change of +/- 26 psi per minute without damage.


  • Functions with FSII base, FreeSpeak Edge base, Arcadia Central Station, E-IPA-HX card, and FSII splitter hardware
  • Designed to work at atmospheric pressure up to 75 psi
  • Typical indoor range: 300 ft (90m), outdoor range: 800 ft (240 m)
  • 1.9 and 2.4 GHz beltpacks operate on a single system
  • Up to 65 - 90 beltpacks on a single system
  • "Listen Again" message replay
  • Simple 2-channel partyline operation to 5-channel intercom on the same beltpack
  • Over-the-air beltpack registration
  • XLR-4M headset connector
  • IP53 rating for wet and dusty conditions
  • Built-in flashlight
  • Uses AA alkaline or rechargeable Nickel Metal Hydride batteries

Item Code

FSII-BP24-X4-O2-US: for high pressure environments XLR-4M headset connector for use in USA; Canada; Mexico

FSII-BP24-X4-O2-EU: XLR-7M headset connector for use in EU countries only



Audio Bandwidth: 200Hz-7.5KHz

No. of Full-Duplex Audio Paths: Up to 5 with individual level control (2 dedicated rotaries, 3 with menu), 2 controls and a main volume

Mode of Operation: Full duplex on all routes

Level/Talk Controls: 4 pushbuttons, a reply button and 2 rotary controls

Enter/Answer-Back Button: 1


Frequency Spectrum: 2.400-2.483MHz for EU and US cellular auto roaming technology

Modulation: GFSK, TDMA frame 10ms full slot

Output power: (EU) 18dBm, (RoW) 22dBm

Range: Typical indoor range 300ft (90m), outdoor range 800ft (240m)

Battery: 3 AA alkaline or Nickel Metal Hydride

Battery Life: 9+ hours

Headset Connector: 4-pin male

Microphone Type: Electret and Dynamic, selectable in beltpack menu

Headset Limiter: Selectable from beltpack menu


IP53 water and dust resistance

Operating: 32º-125ºF (0º-50ºC)

Storage: 32º-150ºF (0º-70ºC)

Humidity: Between 20% and 90%, Non-Condensing Atmospheric pressures of 5.1 atm or 75 psi


Tapered design at largest points

3.75 x 5 x 1.5in (HxWxD)

(97 x 130 x 45mm)


9.0 oz (0.25 kg) including batteries


Ready to get

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