Living in the world of high technology of telecommunication, anyone's conversation can be wiretapped by activting one's cell phone
This device is meant for protecting unauthorized listening by cell phone in distant information access mode
When unauthorized phone activation for listening mode is done, the device will switch on the noise generator, which is built into the device
The level of noise at the phone's microphone is larger than the spoken voice, so that it will not be possible to detect signs of speech
Noise level at phone's microphone: not less than 100db
Spectrum of noise signal: 300 to 4000Hz
Power supply: lithium battery type CR2032