"Column" suppressor of voice recorders and microphones

Ultrasonic acoustic generator for suppressing voice recorders, recording devices in cell phones and wired microphones.
The "Column" suppressor is placed in a standard household acoustic system and has increased radiation power.

Distinctive features:

The most powerful device in its class.
Multi-stage algorithm for analyzing the operation of each ultrasonic channel with a malfunction indication.
Camouflage design.
Control using a wired remote control.
Optionally, it can be equipped with a radio channel remote control.