Cylindrical Anti Microphone Recorder Blocker

In order to facilitate the placement and concealment of the equipment, the audio blocker adopts a vertical cylindrical design and is equipped with 48 ultrasonic transmitters, covering the acoustic pickup frequency bands commonly used by common recording equipment and high-end equipment. It also supports wireless communication shielding in multiple common frequency bands to ensure that digital data exchange cannot be carried out.
https://www.thejammerblocker.com/audio-recorder-jammers/