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Communication Security

Voice Recorder Blocker Model AA77135

The Voice Recorder Blocker is a lightweight, portable device that prevents any unauthorized recording of conversations with digital voice recorders, tape recorders, or other surveillance/eavesdropping devices. It is specifically designed to block digital or tape recorders by emitting a sub-audible tone which cannot be detected by the human ear but will drown out any recordings when played back. The Voice Recorder Blocker is ideal for protecting confidentiality of private conversations and business meetings.

The Voice Recorder Blocker has a built-in clock and can be used as a desktop item by simply placing a telephone on top of it. It also comes with a smart document holder so that it can be carried around and used portably via the built-in rechargeable batteries which will give 2.5 hours of uninterrupted use. The AA77135 is supplied with a remote control to activate or deactivate the unit, and power adaptor/battery charging unit.


    • Dimensions: 290 x 210 x 30 mm
    • Weight: 1.8 kg
    • Operation Time: up to 3 hours
    • Suppression Distance (digital recorders): 2.0 m
    • Suppression Distance (tape recorders): 8.0 m
    • Remote Control Range: 7 m