The basic principle of operation of all indicators is to detect the locations of electromagnetic field concentrations. Then, by changing the threshold of the device, it becomes possible to localize the location of the emitter. SEL SP-222 Black Hunter stands out from other devices of this type by the presence of functions that facilitate the search and detection of transmitters.
The indicator has the following operating modes:
1. Search mode with sound and light indication. Designed to detect covertly installed radio transmitting devices for collecting information. The sound signal in this mode facilitates intuitive searching by sound tone (weak field level - lower tone, high level - higher tone). 2. "Acoustic binding" mode (acoustic feedback). It is used to identify the detected radiation, allowing you to distinguish the radiation of the bug against the background of other radio signals. A characteristic whistle that appears in the speaker after turning on this mode indicates that a radio transmitting eavesdropping device is operating in the room. 3. Guard mode. Used to detect newly emerging unknown radiation in the surveyed area. 4. Digital pulse signal detection mode.
For detecting pulse transmitters: cell phones, digital eavesdropping devices. 5. GSM and DECT signal target search mode.
The new modification of the device has separate LEDs to indicate the detection of DECT and GSM signals.
Distinctive features: - no external antenna; - unique compact design of the device: thin, only the size of a credit card; - the ability to charge the battery both from the network and from the USB port of the computer; - the ability to silently vibrate an alarm in guard mode; - ease of use.
Specifications: operating frequency range 25 - 3000 MHz sensitivity not less than 100 mV/m dynamic range not less than 48 dB detection range: - radio transmitter with a power of 5 mW up to 5 m - cell phone up to 20 m - DECT phone up to 10 m - Wi-Fi transmitter up to 6 m - Bluetooth devices up to 2 m power supply from a built-in battery dimensions 77 x 47 x 5.5 mm