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ST171 is designed for detection of:

  • Cellular jammers (blockers)
  • GPS/GLONASS receiver jammers (blockers)
  • Ultrasonic and electromagnetic jammers of sound recording devices, dictaphones etc.


Additional features:

  • Detection logging
  • Environment snapshot at detection moment
  • Location fixation at detection moment
  • Base stations signals spectrogram indication in 900 and 1800MHz, sonic and ultrasonic ranges.


Control and indication of work results is done by using of Android device – smartphone or tablet. Data transfer between smartphone and RM is done using BLUETOOTH connection. Alarm signal – vibrating and display indication.


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Product description
Documentation and Drivers

Description +

  • Special knowledge for device operation is not required.
  • It is enough to select needed working mode and and further installation will be done automatically.
  • For advanced users additional settings are provided.
  • Detection range of low power portable cellular networks blockers on open space is about 10 meters, ultrasonic Dictaphone blockers – about 5 meters.
  • Fast detection time: 0.1-1.5sec
  • Detection jammer in the car at speeds up to 100km/h


Field of use

Visit to the premises, where, imperceptibly for others, it is necessary to control presence of cellular jammers or Dictaphone blockers.

Stationary control of cars for cellular blockers or GPS receivers presence on entry/exit of the parking area. In this case RM is installed in security booth or any other place nearby the barrier.
Stationary control for cellular blockers or GPS receivers in cars moving along a highway, street etc.
Search of cellular blockers or GPS receivers, installed in stationary car, for example in stolen one. Car can be as inside the garage, as on open area.

Specifications +

Frequency range, MHz 901-907, 925-975, 1570-1580, 1795-1820
Dynamic range, dB 65
Interface Bluetooth, USB
Internal power source Li-ion battery 3.6V
Current consumption, mA, no more than 450
Degree of protection IP54
Temperature range, С -30/+30
Dimensions, mm 83X52x15
Weight, kg 0.06

Complete set +

1 Receiving module ST171R
2 Charger
3 «USB micro – USB» cable
4 Warranty
5 USB flash drive
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