Petrutech Spy Shop
Professional Eavesdropping, Bugging and Surveillance Equipment

Transmitter Voice activated bug spy powerful vox v9


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The VOX9 most important features are the voice activation, i.e it transmits only when it perceive voices, external microphone, 4mm diameter on 5.5 cm cable, and flat design. During silent time, when nobody is at home or during sleeping time, it turns to standby mode, and it draws less current than 1mA from the battery. . The audio bug uses a 9V battery, and will transmit to a remote receiver. You have full control over the sensitivity level of the switching module. You cn adjust it for switching on, for differnt levels of voices, avoiding false switching.

It is a waste of money connecting a transmitter when no one is at home, or during sleeping time. The battery keeps working on this device, but the current is very limited, so you recover the price of batteries in no time!

Furthermore this monitoring device should be activated only when persons are in the room. Therefore and in order to save battery capacity, the VOX9 has been designed according with the latest technology standards SMD. This will save the battery capacity and also will make the transmitter being undetectable when it switches to standby mode.

This voice activated "bug" spying device is using only military grade components.

The VOX9 RF NFM Transmitter has an estimated range from 200m in urban areas and up to 700+ meters (Line Of Sight).


  • Working Voltage: 9V ALKALINE battery.
  • Dimension: only 4 X 2.5 cm !
  • External microphone, 4mm diameter on 5.5 cm cable.
  • Estimated transmitting range: (Up to 700m - LOS on clear)
  • Audio Compression: Amplifies weak whispers, suppress high noises !!!
  • Using SMD, for stability and for smallest dimensions (MIL SPECS 1% accuracy).
  • Additional one more audio stage Increased NB. (Narrow-band)
  • Using encapsulating, for safety!!!
  • Ground Plane design, less interferes with other devices.
  • Frequency range of: 418MHz or 433MHz Crystal Controlled for high stability and privacy.
  • Sensitive electret microphone. Perceives a whisper from 10m, loud and clear. You won't omit a whisper.
  • The device will work up to 3 weeks connected to a 9V battery (alkaline), depending on the freshness and brand.*
  • Professional gild plated PCB for extra stability.

*The calculation on VOX mode for up to 20 days is with a 9V alkaline battery and assuming 2 hours of conversations per day (the total of all the activity of the day).


  • 1 Crystal controlled  UHF VOX9 transmitter.
  • 1 Instructions Manual.
  • Model: VOX9
  • Shipping Weight: 0.05Kgs

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