INTRODUCTION This innovative device in the field of information security is based on the system to generate jamming signals in the box. It effectively protects against eavesdropping and recorders, protects confidential conversations, meeting, business conferences and secret meetings against eavesdropping. The mobile device should be placed in the box, so that the transducers be directed towards possible location (box) of eavesdropping devices (tape recorder, microphones, etc.). DISTINCTIVE FEATURE ● 5 ultrasonic transducers box ● Jammer simultaneously for 5 mobile box ● Full mobile version with power supply from LI-Pol battery capacity 3500mA/h ● Possibility to work from battery from external adapter TECHNICAL CHARACTERISTICS