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Encased vox spy transmitter UHF microphone activated by voice

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  • Model: VOX40
  • Shipping Weight: 0.04lbs



We are often looking for a powerful audio surveillance transmitter, which may transmit the audio wireless, to a long distance remote receiver. However, at the same time, we wish to keep the battery life as long as possible. We also ask for extended privacy, so our transmissions won't be received by someone in the neighborhood.

This is a very powerful voice activated bugging device, named VOX40. It uses a high quality microprocessor. Usually, it is in standby mode, it is not transmitting, and draws just 1mA from the battery - almost nothing. However, as soon as an audio sound is captured by its sensitive microphone, it is automatically activated and begins transmitting. Therefore, it is saving the battery life for a long time. It also transmits the audio, using the UHF band, for your total privacy. It comes incased in an ABS enclosure.

This spying surveillance hidden transmitter is used by the most professional detectives, and also by many authorities and governments, worldwide.


  • Working Voltage: 2 x 1.5V AAA or AA batteries

  • Board Dimension: The size is only 3 cm X 3 cm BOXED so it may work even on severe weather.

  • Transmitter's frequency range: NFM (UHF) 400-460MHz CRYSTAL STABILIZED.


  • Long transmitting range:  up to 4000 m line of sight. (L.O.S). Special powerful design.

  • The Frequency is programmable (In our lab).

  • Quartz Stabilized, 0.000001% drift.

  • On / off switch.

  • High power output! Average: 70mW

  • NFM for power and stability.

  • Using a mil. specs. resin for encapsulating, for safety, security and anti humidity.

  • The device is coated with special Anti-static material.

  • Penetrates through walls and ceilings.

  • User manual is included.

  • High amplification FET microphone, 4mm diameter immersion gold .

  • Professional gold plated board.


  • 1 Crystal controlled PLL PROGRAMMABLE VOX40 Voice activated SPY BUG Transmitter.

  • 1 Battery holder for 2 X AAA or AA batteries (Batteries not included).

  • 1 Instructions Manual.

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