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BLS Wi-Fi Screen Pro – WiFi Eavesdropping Device Detection and Jamming (option) System using WiFi/ Bluetooth connectivity

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BLS Wi-Fi Screen Pro is a system that in data collection and analysis mode does not emit radio signals in any frequency ranges other than electromagnetic emissions of the computer. In signal jamming mode (option) works as an intelligent jammer on all Wi-Fi and BLUETOOTH frequencies and channels.

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BLS Wi-Fi Screen Pro is a system that in data collection and analysis mode does not emit radio signals in any frequency ranges other than electromagnetic emissions of the computer. In signal jamming mode (option) works as an intelligent jammer on all Wi-Fi and BLUETOOTH frequencies and channels.

The System can be used for

iRevealing the work and the physical location of any type of eavesdropping devices with Wi-Fi module or devices transmitting information via Wi-Fi.
iRevealing the work and physical location of any type of Wi-Fi devices, transmitting within 460 m radius in urban environment (depending on the antennas and antenna block).
iWi-Fi network performance analysis- coverage at different points, traffic and speed, devices connected to the network, business traffic/real traffic and operation of all repeaters, extenders and hotspots of the mobile network. Analysis the real performance of the Wi-Fi base stations with all connected devices.
iDetection of unauthorized access attempts to Wi-Fi networks from external devices whether the attempt is successful or not. The system also identifies the attempt to connect.
iPrevention of the Wi-Fi networks and devices from attacks.
iAudit of the Wi-Fi networks and computer security systems. Identification of unauthorized networks, unauthorized connections, unauthorized devices, unallowed connections and communications in the networks, etc.
iIdentification of individuals committing computer crimes and prevention.
iDetection of spyware in the mobile phones.
iDetection of eavesdropping and tracking devices installed in vehicles that have Wi-Fi module.
iTracking detection.
iDetection of unwanted presence of people and devices in a specific area.
iDetection and localization of people, using Wi-Fi or having device with Wi-Fi modem in urban and non-urban area.
iEstablishing the relations between different people and their previous visits to different areas of the city, state, world /depending on the hardware and software version of the Wi-Fi devices used by them/.
iTracking and localization of people and vehicles.
iIdentification of skimming device (a device that steals credit and debit card information from ATMs) and detection/localization of the people or the device, receiving that information.
iJamming of individual base stations or clients, as well as total jamming of Wi-Fi and BLUETOOTH channels.

The system is designed for:

  • National Security Services (counterintelligence, anti-terrorism, etc.)
  • Intelligence – Police and Services for Combating Organized Crime
  • Agencies for TSCM services – Private and state VIP security guards
  • Corporate Security Services – System administrators, individuals and companies responsible for information security of the computer networks and systems.
  • Wi-Fi installation companies


The “BLS Wi-Fi Screen Pro” system includes specialized software installed on a laptop and antenna block (box) connected with USB cable.

The connection of the Antenna block with the laptop is with USB cable.
In addition to the directional and omnidirectional antennas (included in the set), any other types of antennas can be connected to the antenna block trough standard SMA RF connector and antenna feeder.
The Antenna block coordinates the antenna adaptors performance and speeds up the information transfer.
In an emergency mode (broken or missing antenna block), the BLS Wi-Fi Screen Pro can operate with most of the available Wi-Fi USB adapters on the market, as the system has a software module for recognition, coordination and connection of Wi-Fi adapters.In this mode the range, speed and functionality of the system will be limited, but sufficient for most of the tasks.

Technical specifications of the system:
– Computer Operating System- Linux Debian
– Works in the entire 2,4 GHz and 5 GHz Wi- Fi range.
IEEE 802.11a/b/g/n Dual-Band Standard
IEEE 802.11ax- Wi Fi 6 Standard

1.1 Frequency ranges:
2.400 ~ 2.483GHz; 5.15 ~ 5.35GHz; 5.47~ 5.725GHz

1.2 Data transfer speed (DTR) in different modes
i802.11a: 6, 9, 12, 18, 24, 36, 48,54Mbps
i802.11b: 1, 2, 5.5 and 11Mbps
i802.11g: 6, 9, 12, 18, 24, 36, 48, 54Mbps
i802.11n: Up to 150Mbps

1.3. Security protocols supported by the system
64/128-bits WEP, WPA, WPA2, 802.1x

1.4. Sensitivity:
802.11bg:-93 dBm
802.11n HT20: -80 dBm
802.11n HT40: -75 dBm
802.11a: -93 dBm
802.11an HT20: -85 dBm
802.11an HT40: -74 dBm

1.5. Output power
26dBm@11n HT20
25dBm@11n HT40
23dBm@11an HT20
21dBm@11an HT40

Capacity of the recorded information per hour- around 1 MB, depending on the Wi-Fi devices intensity in the area.
Running time on power adapter- 24/7/365
Running time on battery- up to 5 hours
Scanning speed – not less than 24 channels per second

1.6. Support- Bluetooth 1.0; 1.1; 1.2; 2.0+ EDR; 2.1+ EDR; 4.0; 4.1; 4.2; 5.0; 5.1.

Type of the information that the System obtains and analyzes

iBSSID- MAC address of the transmitting Wi-Fi devices
iSignal strength- in dB and in graphic format
iThe number of each channel that the device has worked, number and frequency of the current channel
iExact frequency
iThe time when the device has worked
iData rate
iTraffic volume
iEncryption type
iWireless devices connected to the base stations
iInformation about the networks searched by the client- networks that are already stored in the client’s memory or the devices are trying to connect in real time
iGPS positioning of each measurement and record- in tabular and graphic format

Filters and settings

iThe system is able to create and operate with predetermined settings, depending on the type of tasks.
iCreating Filters/ Lists (Black and White lists). Ability to work with several Filters/ Lists simultaneously.


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