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UHF transmitter 3V to 6V stabilized by quartz crystal

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  • Model: BU-36S
  • Shipping Weight: 0.03lbs



For extended distances, a spying and bugging listening device that employs the UHF frequency is used.
A quartz crystal controls frequency stabilization, and the output is amplified.
The audio stage on this long-distance listening gadget has been enhanced.

It is a strong audio bugging transmitter with an inbuilt microphone and a flexible exterior antenna that is ideal for covert installation in a variety of locations or rooms.
Crystal frequency control eliminates and stabilizes frequency drift.
The listening device will be hidden in a secret location within a room, such as beneath the bed, behind a desk, within a toy, or in any other item.
After placing the batteries into the battery holder, it will detect noises in the room and send them to one of our receivers or our UHF FM transmitter, up to 600 meters in open space, line-of-sight.

Compatible receivers:

or any receiver within 400-450 MHz band and 2.5 kHz steps.



  • Working Voltage: 2 x 3V Lithium (CR2032 to CR2450)

  • Board Dimension: The Diameter is only 2.4 cm (1.0")!

  • Transmitter's frequency range: NFM (UHF) 433.6-433.9MHz crystal stabilized.

  • Long transmitting distance: up to 600 m on clear. (L.O.S). Special powerful design.

  • Using a compound material for encapsulating, for safety and security.

  • The device is coated with special Anti-static material.

  • Penetrates through walls and ceilings.

  • Tiny sensitive FET audio microphone, you pick up a whisper from long distance, crystal clear. 

Packge Includes

  • 1 x Crystal controlled PLL Crystal controlled BU36 SPY BUG Transmitter.

  • 1 x Instructions Manual.