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The ANG-2000 is designed to defeat wired microphones inside walls, contact microphones, audio transmitters located in AC outlets, and laser/microwave reflections from windows. Most sound masking systems inject noise in to an otherwise benign environment. In this environment, the occupants must raise their voices above the noise level to communicate, which invariably, eliminates the benefit of noise masking. REI's masking system injects noise into the environment perimeter and not directly into the environment. This approach allows normal conversation while defeating eavesdropping devices that rely on acoustic leakage.

The REI noise masking system consist of a main unit (the ANG-2000) and three optional accessories that are purchased to tailor the system to the particular target environment.

Price $795.00

The ANG-2000 accessories are:


The PNG-2000 is designed as a portable acoustic noise generating unit that can be used in a variety of ways. The noise generating circuitry has been optimized for voiceband noise masking against listening devices and is designed to reduce the effectiveness of eavesdropping devices such as microphones and tape recorders. When multiple units are used in concert, a complete environment masking system can be easily installed in any environment. The PNG-200 can be mounted to smooth surfaces using suctions cups or simply placed in an area that potential eavesdropping devices may be present.

Advantages of the PNG
Optimized voiceband noise masking for acoustic interference against listening devices. (Acoustic noise is tailored to voice frequencies). Mounts easily to windows using suction cup (included) to defeat the high tech laser threats. Mounts easily to walls for protection against listening devices that rely on acoustic leakage (ie. contact mics, spike mics, human ear). Portable: Can be carried easily in coat pocket. Multiple units fit easily in a briefcase. Stylish anodized aluminum construction designed for ruggedness and portability.


Size: 5.38x3.38x1.25 inches (13.6x8.59x3.18 mm)
Weight: 12 oz. (340.2 g)
Audio Frequency Range: 300Hz - 3KHz
Output Sound Level: MAX 92 dB @ 4 ft.
Power: two 9 volt alkaline batteries or AC transformer (120 or 240 VAC)
Battery Life: typically 7 hrs. at 1/2 level; 2 hrs. at full level. Includes: Carrying case, AC transformer, and suction cup window/wall mounting kit.



Keep your private conversations private! The AJ-34 AUDIO JAMMER protects your sensitive room conversations by generating a random masking sound which desensitizes any near-by microphone. Effective against any microphone based eavesdropping device including tape recorders, RF transmitters, hard-wired microphones (including contact type) and shotgun microphones. It also protects against microwave or laser reflection pickups. Because the sound from the jammer varies randomly in frequency and amplitude, it cannot be easily filtered and the only sound the eavesdropper will hear is the jammer noise. The convenient end-mounted control lets you select the level of protection for your situation. One unit will protect up to 150 sq. ft. For protecting rooms larger than this, we recommend and additional jammer for each 150 sq. ft. of area. The illustrated instructions show suggested jammer placement for different types of rooms and situations so that you can use the AJ-34 effectively. The AJ-34 is powered by one 9 volt alkaline battery (included). The unit measures 4" x 2.5" x 1.5" and weighs 7 oz.



NOTE: Electronic Countermeasures detection is NOT an exact science and therefore no guarantee whatsoever has been, or can be made, as to the results obtained when using any of these devices.


1717 Montana Ave.
El Paso, Texas 79902 U.S.A.
Voice Line: (915) 533-5746
FAX: (915) 532-5687

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