For detection of the included and switched off latent overhearing devices, sound recording devices, and also explosives with the electronic detonators controlled on the radio channel; exact definition of a site of the found out radio devices; distinctions of electronic object from noise contact object; definitions of a mode of operation of the device (switched on – switched off). Ensures the functioning in conditions of influence of the strong external radio noise created: cellular

communication, television transmitters, radio stations, radio telephones etc. Detection is carried out by an irradiation of a controllable zone by a continuous or modulated probing signal with the subsequent reception and the analysis of a signal of the response simultaneously on the second and third harmonics of irradiating signal. The information on the fact of detection is given out as a sound signal in headphones, and also on a control panel as light signals on indicators of a level of red color at detection of electronic object or on indicators of a level of green color at detection contact noise object.