SEL-324B "Column" Dictaphone and Microphone Jammer

SEL-324B "Column" is a powerful and effective device for suppressing microphones in voice recorders, mobile phones and other audio recording devices by emitting complex structured interference in the ultrasonic range, inaudible to the human ear, but affecting the microphone membrane with its sound pressure directly.

Advantages and distinctive features:
Structurally, the SEL-324B "Column" suppressor with 24 ultrasonic emitters is designed as a module replacing a low-frequency speaker and is easily mounted in the housings of various desktop, shelf or wall-mounted acoustic systems of popular brands.

For even greater power of ultrasonic interference generated by the SEL-324B "Column" suppressor, it is possible to install a module with 48 round or rectangular ultrasonic emitters in the housing of the acoustic system.

Due to the possibility of promptly changing the radiation direction and the resulting effect of multiple reflections of ultrasonic interference from interior objects, the area and efficiency of suppression of microphones and other audio recording devices brought into the room increases.

The microprocessor control system, automatic continuous self-diagnostics of each ultrasonic channel maintain a constant highest level of ultrasonic interference power throughout the entire operating time, ensuring high reliability of the product and ease of use.

The universal power supply system allows the SEL-324V "Column" suppressor to operate continuously from a 220V network or autonomously for up to 3 hours from an internal battery.

In addition to manual "push-button" switching, the SEL-324V "Column" suppressor has a remote wireless control system using a radio key fob.

Characteristics

Range of generated ultrasonic interference 24 - 26 kHz
Number of ultrasonic signal emitters (UIS) 24 (48 - optional);
Directionality of microphone suppression perpendicular to the plane of the UIS
On/off button or wireless remote control)
Maximum installation height for effective suppression 4 m
Power supply 220 V network (battery - optional)
Continuous operation time is unlimited (3 hours from the battery)
Mounting installation dimensions (minimum) correspond to the dimensions of the used speaker system
Casing material wood or plastic
Operating temperature range from 0 to +50 °C

The basic delivery set of the SEL-324V "Column" voice recorder and microphone suppressor includes:

1. SEL-324V "Column" product with a module for 24 emitters.
2. Remote control keychain with a spare battery.
3. 220 V power cord.
4. Operating instructions and passport for the SEL-324B "Column".
5. Packaging cardboard box.

Optional:
1. The SEL-324B "Column" product with a module for 48 emitters.
2. Built-in autonomous power supply system with a battery.