Petrutech Spy Shop
Professional Eavesdropping, Bugging and Surveillance Equipment

uhf listening device using quatz 3 to 6v external microphone


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A small spy bug transmitter designed for room monitoring. It uses 2 cell batteries (CR2430). It includes an external microphone, making the hiding task easier than ever. Broadcasting on the UHF band and achieving high performance and privacy. The range is approx. 200m on built area and up to 500m (line of sight). Maximal drawn current: 18mA. Maximal output 12Bm. Super sensitive microphone, only 4 mm diameter, on a 6 cm flexible cable. Requires an UHF receiver (we sell 3 UHF receivers) or an UHF scanner. One of the best listening devices on the market!
This device is manufactured to intercept audio informations and transmit it via radio channel.
The transmitter is on a printed circuit board, protected with a plastic cover. The battery holder is located on the back of the circuit board. The product is also equipped with an external miniature microphone and external antenna.
The transmitted signal can be received by one of our special receivers or by any regular scanning receiver with NFM mode.
As soon as the battery is installed into its case, the product will turn on immediately to active.
This transmitter is designed especially for places where is difficult to hide listening devices. The L36M broadcasts powerful, clear sound. The transmitter is designed and tested in our specialized laboratory and tested as well "on field" by high skilled engineers for maximal distance.


  • Working Voltage: 2 x3V Lithium (From CR2032 to CR2450)
  • Board Dimension: The Diameter is only 2.4 cm (1.0")!
  • External microphone: 4 mm diameter on a 6 cm cable.
  • Transmitter's frequency range: NFM (UHF) 433.6-433.9MHz CRYSTAL STABILIZED.
  • Long transmitting range: up to 500 m on clear. (L.O.S).
  • SMD built, for more stability and range (MIL SPECS 1% accuracy).
  • EXTRA amplified, buffered output!
  • NFM - The only one Varicap controlled for power and stability.
  • Using a patent pending material for encapsulating, for safety and security !!!
  • The device is coated with special Anti-static material.
  • Penetrates through walls and ceilings.
  • Very easy, no time installation.
  • User manual is included.
  • Its tiny electret (Condensed, omnidirectional) microphone is so sensitive, that you listen to a whisper from about 30sq.ft (100sq.m) radius , crystal clear. You won't miss a word. USA made by Motorola high amplification FET microphone.


  • 1 Crystal controlled PLL Crystal controlled L36M SPY BUG Transmitter.
  • 1 Instructions Manual.
  • Gift
  • Model: L36MS
  • Shipping Weight: 0.03Kgs

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