FreeSpeak II 2.4 GHz O2 Wireless Beltpack

  • 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 Part Number:

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

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.

Technical Specifications


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

Associated Products

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