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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 looking often for a powerful audio surveillance transmitter, that can transmit the audio wirelessly, to a remote receiver, from a long distance.
However, at the same time, we wish to keep the battery alive as long as possible.
At the same time, we look 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 encased 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 in 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.
  • The 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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