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The Buddy Phone Surface Unit

Air Line by J Sink

Allows communication between divers and surface personnel when used with divers using the Spectrum Full Face Mask or Mantis Mask with Buddy Phone combination. Provides excellent through-water communications in a compact, affordable platform.

Product Description

Buddy Phone 2 Channel Surface Station, includes 35' ft. Transducer Cable & Hand Held Microphone

The SP-100D2 Surface Buddy Phone is newly designed. State-of-the-art Digital Signal Processing circuitry (DSP - known as " Software Defined Radio") has been incorporated ensuring great performance and clarity. The new DSP Squelch circuitry is the industry leader.

The SP-100D2 will operate with all single sideband acoustic underwater devices within range and on the same frequency. The user simply places the SP-100D2 Buddy Phone in a secure area, lowers the 35 ft. transducer cable in the water, turns the power on and talks via the hand-held microphone. All divers and/or other surface stations within range and the same frequency will receive the message. When any other persons within range and on the same frequency talks, the voice will be heard from the front panel speaker of the SP-100D2.

The SP-100D2 Buddy Phone is compact and operates on (8) AA Alkaline batteries, ensuring hours of fun. For those who require extreme long life, two battery packs (16 AA) batteries can be utilized. You can monitor and talk to divers while the action is happening. A must for all dive boats and/or dive operations.


  • Nominal Range: 50 to 500 meters depending on sea conditions & noise levels.
  • Transmission Type: Ultrasound using upper single sideband (USB)
  • Transmit Output Power: Ultrasound using upper single sideband (USB)
  • Standard Frequency (PEP): Recall & tone: Freq. A (Channel 1): 32.768 kHz USB, Freq. B (Channel 4): 31.250 kHz
  • Audio Bandwidth: 300 to 3,000 Hz
  • Automatic Gain Control: Greater than 80 dB
  • Earphone: Ceramic
  • Microphone/Speaker: Hand held, PTT, dynamic, 500 ohm impedance
  • Transducer: Ceramic cylinder
  • Battery Type: 8 AA alkaline; or 16 AA alkaline. Batteries not included (can also use external 12V DC power source)
  • Maximum Operating Depth: 130 feet in sea water (fsw)
  • Battery Life (10% Duty Cycle): 8 cells: 10 hrs; 16 cells: 20 hrs (fsw)
  • Maximum Operating Depth: 130 feet in sea water (fsw)
  • Dimensions: 9" x 7.85" x 3.70", 2.5 lbs
  • Warranty: 1 year

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