Petrutech Spy Shop
Professional Eavesdropping, Bugging and Surveillance Equipment

Set UHF VOX 9V transmitter and programmable receiver 433 MHz

$389.90  $350.91
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Set transmitter with vocal activation VOX9, and programmable, high quality, sensitive receiver

Unique combination between the spying wireless transmitter, featuring voice activation, VOX9 and the programmable, sensitive UHF receiver Petru433.

The VOX transmitter is stabilized by a component named quartz crystal. It stabilizes the frequency, so even if touching the antenna, which is very short, the frequency remains steady. The Vocal Activation is very a very important feature. During the silence time, when nobody is at home, or during sleeping time, the UHF transmitter is not transmitting, therefore the current from the battery is almost zero. As soon as a sound is captured by the sensitive external microphone, the spying device is activated and transmits the audio, clear and powerful, to the receiver. The spy VOX transmitter has an adjustable trimmer, and the customer can adjust the sensitivity.

The receiver is one of the most sensitive UHF receivers you ca use, and due to this sensitivity, it almost doubles the distance compared to other receivers. This is a modified transceiver, and the receiving plate was replaced by our special design. It has a rechargeable battery, and the sound is exceptional.



  • 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 1000m - LOS, Line Of Sight)
  • 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)
  • Encapsulated.
  • Ground Plane design, no interference with other devices.
  • Frequency: 418MHz or 433MHz Crystal Controlled for high stability and privacy. The default is MHz
  • 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 gold-plated PCB for extra stability.


  • Working Voltage: 3.7V Li-ion, 1500mAh. rechargeable.
  • Estimated working time between chargings: 10-12 hour.
  • Smart charger: Desktop charger
  • Dimensions: 110 X 50 X 32 mm (without antenna)
  • Stability: 2.0ppm.
  • Frequency: True NFM (Narrow Band FM) or WFM (factory programmed).
  • Distance: Extreme Long receiving distance. Picks up transmissions through walls and ceilings.
  • Receiver's frequency range: Frequency range 400 - 450 MHz (PROGRAMMABLE).
  • Sensitivity: Better 0.55 µV into 50 Ohm (12 dB/sinad).
  • Deviation: 2.5 KHz to 6 KHz
  • Outlets for external audio recording or earphones.
  • Adjacent Channel Selectivity: ≥60dB
  • Gold plated PCB.
  • 15 programable channels (in our lab)!
  • Audio:High quality 1000mW
  • Antenna: semi-flexible DETACHABLE antenna, 10 cm.
  • Adjustments: No adjustments are required.





Set transmitter VOX9 and receiver   Powerful micro spy bug transmitter VOX in UHF Band   UHF Receiver  

  • Model: PTRVX9
  • Shipping Weight: 0.08Kgs

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