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UHF Voice Activated Programmable Transmitter 3Volts 25mW

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$218.75 $174.90Save: 20% off
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  • Model: VOX 30S
  • Shipping Weight: 0.06lbs



A VOX is a listening device which transmits audio wirelessly to a compatible receiver. Unlike the usual bugs, it transmits only while there is a voice nearby. During silence it turns to standby.

This voice activated listening device, will offer you extra power and distance. It is the improved model of the small and effective voice activated VOX8 and VOX9.
The UHF transmitter transmits on the 433MHz UHF band and the output is approximately 25mW  (in 50 Ohms antenna).
It uses the most modern and highest quality programmable micro controller, for excellent performance.
The longest distance that you can reach is about 1 km, line of sight.

VOX characteristics:

The common problems most bugs have are relative short battery lifetime and the output power.
This listening device offers an incredible long battery lifetime.
In standby mode, it draws less than 1mA. However, when a sound or a voice is heard by the sensitive microphone, it switches imediately to transmission.
The standard batteries:

1. 2 x AAA Alkaline (default).
2. Upon request, custom layout, 2 x AA Alkaline batteries.

If you use 1250mAh batteries in non stop transmitting mode, the battey lasts for approximately 24 hours. However, in standby mode, approximately up to 960 hours (40 days)!
It is terrific for room surveillance, baby listening, nature studies, and so on.
The sensitive microphone and high frequency stability (PLL quartz oscillator) results the best device you may find.
The frequency is programed by us and cannot be modified by the user.

This bug spy transmitter is designed especially for crowded or ground level areas, or even cars.
VOX30S transmits a very powerful and clear sound.
We build the bugging listening device and test it in our specialized laboratory and in real conditions by professional staff for maximal distance.


  • Working Voltage: 2 x 1.5V (AAA) batteries

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

  • Frequency range: NFM (UHF) 433.4-433.99MHz or 418MHz CRYSTAL STABILIZED.

  • Voice activated (VOX).

  • Long transmitting range:  up to 1000 m on clear. (L.O.S). Special powerful design.

  • SMD design, for more stability and range (MIL SPECS 1% accuracy).

  • Frequency is programmable (In our lab).

  • Quartz Stabilized.

  • On / off switch.

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

  • The transmission penetrates through walls and ceilings.

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

  • Professional gold plated board for extra stability.



Please note: We can supply several frequencies on demand, however it may take up to 4 business days for supplying special frequencies on UHF 433 or 418 MHz band. If required, please contact us.


  • 1 x Crystal controlled PLL PROGRAMMABLE VOX30S Voice activated SPY BUG Transmitter.

  • 1 x Battery holder for 2 X AAA (Batteries not included).

  • 1 xUser Manual.

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