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UHF transmitter 3V to 6V stabilized by quartz crystal

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



A powerful audio bugging transmitter, using internal microphone and flexible external antenna, it is recommended for hidden installation in various types of properties or rooms.
Crystal frequency control eliminates frequency drift and stabilizes the frequency.
The spying audio device will be concealed in a hidden place inside a room, like under the bed, under a desk, inside a toy or in any other object. After inserting the batteries in in the battery holder, it will pick up the sounds in the room and transmit them to a one of our receivers or to our UHF FM transceiver, to a distance of up to 600 meters in open space.

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.