FM radio transmitter in digital HI-FI stereo quality version II.

The transmitting frequency can be changed in the range 87-112,5 Mhz from the step 100 khz the transmitting frequency is visible on the display. The transmitter contains a ppl unit, so a stable transmitting frequency is ensured. The transmitter power is rechargeable in 20 milli watts or 1 watt, even in mono or stereo mode by pinching F.

The range of the transmitter at 20mW with an internal antenna is about 150 meters, with an antenna on the roof is approximately 1km provided that we choose a frequencie clean, where no one transmits any radio at least 150khz on each side.

Noise 4x Channel NF Vibroacoustic Noise Generator securitySP-55-907x4 for 4x independent rooms

The system is used to provide up to 4x independent rooms to prevent information leakage through acoustic and vibroacoustic channels.

Leak information from the room using noise vibrations that are created in Windows walls, or pipe acoustic signals circulating in each room, and can be intercepted by an intruder. It allows the connection of up to 46 piezoceramic acoustic converters, 8 low-impedance speakers, or a combination of them.

Ultrasonic and Acoustic Portable Speech Protector (1)

The portable speech protector is the most sophisticated device on the market to protect your confidential conversations. With two modes of protection, you can covertly protect your voice or activate the acoustic jammer to insure your private communications.

Vibroacoustic and acoustic noise interference (2)

The vibroacoustic and acoustic interference system is designed to counteract special unauthorized data retrieval devices that use the room's walling as leak channels. Such devices include:

electronic and acoustic stethoscopes that are used for tapping through ceilings, floors and walls

system is a technical means of information protection, designed to protect premises from on-demand through walls and engineering technical communications

Vibroacoustic electromagnetic repro sensors. It was designed to operate together with securitySP-55-907x4 for 4x Channel NF Generator Vibroacoustic Noise SecuritySP-55-907x4 Vibroacoustic Noise System. Its function is to turn the electrical signals generated by the noise generator into vibrations of walls and glass windows.

Characteristic features: - low weight and small dimensions allow installation in windows.

- the electromagnetic principle of transformation ensures the high efficiency of this device, its wide frequency band, low level of unwanted acoustic noise, and the small size of the apparatus;

- hermiticity, - generality: can be used with all vibroacoustic generators with electromagnetic load.

Vibroacoustic Electromagnetic Sensor 908-securitySP-55-907x4 for 4x Channel NF Generator Vibroacoustic Noise SecuritySP-55-907x4 

Vibroacoustic electromagnetic sensor. It was designed to operate together with the Noise 4x Channel NF Generator Vibroacoustic Noise SecuritySP-55-907x4 vibroacoustic noise system. Its function is to turn the electrical signals generated by the noise generator into vibrations of pipe walls and windows.

Characteristic features:

- the electromagnetic principle of transformation ensures the high efficiency of this device, its wide frequency band, low level of unwanted acoustic noise, and the small size of the apparatus,

- hermiticity,

- generality: can be used with all vibroacoustic generators with electromagnetic load.

Vibroacoustic electromagnetic sensors. It was designed to operate together with securitySP-55-907x4 for 4x Channel NF Generator Vibroacoustic Noise SecuritySP-55-907x4 Vibroacoustic Noise System. Its function is to turn the electrical signals generated by the noise generator into vibrations of walls and glass windows.

Characteristic features:

- low weight and small dimensions allow installation in windows.

- the electromagnetic principle of transformation ensures the high efficiency of this device, its wide frequency band, low level of unwanted acoustic noise, and the small size of the apparatus;

- hermiticity, - generality: can be used with all vibroacoustic generators with electromagnetic load.

The generator block SP-157aG constructively contains two independent generation channels with a seven-band (octave) equalizer and two parallel outputs to the load. Each channel generates a noise-masking broadband electrical noise signal consisting of analog white noise and speech-like noise (converted from digital).