OTS SP-100D Surface Comm Unit Top of the line underwater and surface to water communication unit Like New Inludes: State-of-the-art Digital Signal Processing circuitry SP-100 Buddy Phone tranceiver Encapsulated ceramic attached to a 35' cable with connectors Hand held Micro-phone, push-to-talk, dynamic, 500 ohm impedance SP-100D Surface Buddy Phone® (900386-000) Specifications:  Nominal Range: 50 to 500 meters depending on Sea Conditions and noise levels.  Reference Frequency: 32.768 kHz upper single sideband.  Audio Bandwidth: 300 Hz to 3,000 Hz. Automatic Gain Control: Greater than 100 dB. Transmitter/Audio output: 1/2 watt (Transmitter), 1/2 watt (Speaker). Microphone: Hand held, push-to-talk, dynamic, 500 ohm impedance. Transducer: Encapsulated ceramic attached to a 35' cable with connectors. Receiver Sensitivity: Greater than 100 dBv. Squelch: Digital, using human voice recognition Battery Type/Life: 8 AA Alkaline Batteries = 10 hrs. or 16 AA Alkaline batteries = 20 hours (nominal). Low Battery Alarm 1 beep every 60 seconds when battery level is below 7 volts. Record-Out: Line level via panel RCA jack. External Power. 12V, DC@ min. of 1 amp. access via front panel mini double banana plug. Housing & Dimensions: Width: 9.00, Height: 7.85, Depth: 3.40. Use your browser's "Back" button to return to the listing OR Enter the Discount Divers Supply Homepage