Noiseless Audio Recorder Suppressor

SKU: B31


Out of stock

Advanced technology. No noise at all. Blocks 85% analog recorders. Working frequency 100~20000Hz. Makes recorder only take BUZZ noises. Remote control turns on/off. 1-year warranty.


Nowadays, there are so many digital recorders abused and infringed, from personal secrets, business information and personal privacy.

In order to protect conversations from being recorded by unauthorized recorders, the Noise Audio Recorder Suppressor can effectively block the digital or tape recorders. It works between 100Hz and 20000Hz and makes spy audio recorders take records of “BUZZ” noise but they can not record any normal conversation contents.

Unlike the white noise generator, the noiseless audio suppressor makes no noise at all. The mass codes have been compressed and transmit to the outside via ultra high-gain antenna which is built in the case.

It can block 85% of the analog recorder equipped with wire or no wire microphone. It can not block recorders built-in mobile phones according to real tests.

The outstanding strong output power ensures that the conversation cannot be recorded. If used in big conference rooms, you need to use 2~3 units together. They will not interfere with each other.

Features of B31 – Noiseless Audio Recorder Suppressor

  1. Blocks cassette recorders within 8 meters;
  2. Disables digital voice recorders within 1-3 meters;
  3. Built-in real-time clock and working symbols;
  4. Remote control to turn on/off within 7 meters;
  5. Long operating time – up to 2.5 hours;
  6. Intelligent fast battery charger;
  7. Suitable to carry around and easy to operate.

Package includes

  • B31 – Noiseless Audio Recorder Suppressor
  • Power Adapter
  • Remote Control


To avoid interference and risks, do not use the audio recorder suppressor in Hospitals, Aircraft, Blasting areas and so on. Please read the user’s manual carefully before operating the suppressor.

Additional information

Weight 1.8 kg
Dimensions 29 × 21 × 3 cm

Technical specifications

Product code: B31
Frequency: 100~20000 HZ
Signal Source: Noise
Beam Width: Horizontal - 150 degree; Vertical - 120 degree
Output Power: Max 3 watt
Working Object: Digital recorder 1~3 meters (10 feet) - Cassette recorder max 8 meters (26 feet) - Mobile phone recorder WORKLESS
Typical Coverage: 3~8 Meters
Remote Control: 7 meters
Power Source: Battery or power adapter
Battery: 14.4VDC 4500mAh Ni-MHx12 Rechargeable Battery - Battery life 2.5 hours
Power Adapter: 110V-240VAC / DC 24V 3A

Extra Info

Color: Black
Brand: Jammers
Dimensions (LxWxD): 290 x 210 x 30 mm / 1800 gram
Package: PU leather bag
Operating Temp: -40 ~ 55 degree
Humidity: Up to 90%
Warranty: 1 year