Phased microphone array properties

64 independent acoustic channels.
Produced from strong and lightweight material with density of 1.20 g/cm3, it offers good impact strength.
Material life : 80 years.
Color : black.


  • range of intercepting sound - 150 meters, range exceeds 200 meters in urban areas without heavy presence of noise
  • noiseless acoustic gain - 26dB at 1KHz
  • directivity factor - 10 degrees first order
  • water resistant
  • shock resistant
  • weight 3 kg

Microphone and headphone amplifier specification

To obtain maximum quality of the received sound all components used in amplifier are from the ULTRA LOW NOISE semiconductors class.
The headphone amplifier works with all commercial types of headphones.
22 hours continuous work.


  • microphone sensitivity - -28 dB
  • microphone signal to noise ratio 80 dB - self noise 14 dBA
  • low noise microphone preamplifier - input noise stage lower than 0.4 nV √Hz
  • filter off frequency range - 20 Hz - 16 KHz
  • filter on frequency range - 300 Hz to 4.5 KHz
  • AGC system - posibility for setting threshold level manualy
  • headphone output power - up to 2 Watts in standard 32 Ohm headphones
  • unprocessed, unfiltered line out for recording
  • electromagnetic shielding of the electronics

Battery pack

Rechargeable long life Li-Ion batteries.


  • 6 cells Li-Ion
  • Fully charged 23.8V - nominal 23V
  • 2200mAh
  • average working time fully charged - 22 hours
  • 5 years battery life
  • non capsulated battery - easy to replace after 5 years service

Camouflaged laptop case properties

Fully identical to the original one.
All modifications to the case, which carries directional microphone and headphone amplifier, cannot be spotted from outside


  • dimensions - standard 17 inch laptop case
  • material - polyester
  • color - black
  • waterproof against rain