USJ-02/III – Accu 20-25 kHz

Description

Ultrasound jammer USJ-02-Disc is a powerful device intended to prevent unwanted eavesdropping or the making of an unauthorised recording using various spy and recording devices, e.g.:
– GSM a UMTS spying devices
– radio spying devices
– mobile phones and PC
– digital and analog dictaphones
– spying devices based on microphone, placed in various things like button, tie, watch,
– videorecorder and many other common recording devices

How it works
  • The device operates on the principle of saturation the spying device microphone with ultrasound which is of proper frequency and it results into input amplifier circuits limitation.
  • Frequency combination of ultrasound is generated with respect to elimination of local points
    (nodes) with low level of ultrasound. This enhances the efficiency of the device greatly.
  • USJ-02-Disc is designed to cover space by ultrasound in horizontal range of 360°. Vertical
    angle of ultrasound beam is approx. 50°, so majority of acoustic power is radiated in horizontal
    direction.
  • Acoustic signal corruption caused by ultrasound and by limitation of electric signals in device
    circuits makes original audio signal unrecoverable.
  • Device is intended to be placed on a table or other flat surfaces. It may also be placed on the base* for better covering the area of the table top. Mounting bayonet bed* can be used in case it is necessary to fix the jammer under the table or on the wall.

*optional accessories

Technical data

  • type description: : USJ-02-Disc
  • power supply: 12 V DC / 1.5 A (10 to 14V)
  • built-in Li-Ion cells: 4 x 3.6 V, 3400 mAh
  • accumulator operation: ~ 3h
  • maximum power consumption: 18 W
  • ultrasound frequency: 21 and 25 kHz
  • horizontal ultrasound beam angle: 360°
  • vertical ultrasound beam angle (-6dB loss): ~ 50°
  • sound pressure level: 110 dB at 1m distance
  • operating temperature range: 0 to 30 °C
  • colour, material: plastic parts – black RAL 9005
    • alluminium alloy body – black anodized
    • stand, mounting plate – painted stee
  • intended for use in dry indoor environments only

Optional accessories

The base
enables to place the jammer 16cm above the table top. It
is of great advantage in case there are any objects lying
around that may block the transmission of the ultrasonic
beams. The spying or recording device could be partly
shield and the efficacy of the jammer might sink. The
higher the jammer possition, the better the area of the
table top is covered. This up possition is also advantageous to jam the recording devices in breast pockets.

Mounting bayonet bed
is used in case it is necessary to fix the jammer under the
table , e.g. to jam the recording device that is in a pocket
of trousers. In this situation the jammer that is assigned
to treat the space of the room cannot be relied on, as the
recording device is covered by the human body from the
back and by the table top from above. Fixing US Disc
under the table solves the problem.

The USJ-02-Disc device is equipped with an integrated
switch-off timer that is set by the manufacturer for a
three-hour period. This time period can be changed when
requested. (through the service connector inside the
device, which can be reached after the cover is taken off)

As a part of the device there is the remote control for
switching it on and off

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