Micro Spy Bug – Long-Range FM Audio Transmitter Up to 700m · Operates Outside FM Broadcast Band (Spy-IL3)
Spy-IL3 Professional Mini FM Spy Bug — Crystal-Stabilized Signal, Up to 700m Range
• Crystal-stabilized FM transmission for a clean, stable signal
• 5 mm high-sensitivity microphone (picks up even faint whispers)
• Up to 700 meters line-of-sight range in open area (real-world depends on obstacles)
• One-button frequency tuning: 76–110 MHz (ships tuned to 77.0 MHz)
The Spy-IL3 is a compact professional FM audio transmitter designed for discreet live listening where signal stability, audio clarity, and concealment are critical.
It ships factory-tuned to 77.0 MHz and can be re-tuned with a simple one-button procedure anywhere between 76 and 110 MHz (see the video below). Each unit is tested and tuned before shipping.
Designed for covert audio intelligence capture
Spy-IL3 is purpose-built for situations where unnoticed acquisition of sound information is required. Its miniature size, lack of visual indicators, and low-visibility antenna allow the device to operate without drawing attention to its presence.
The transmitter can be discreetly placed inside a controlled area, enabling remote audio monitoring while the operator remains at a safe distance using a compatible FM receiver.
There are no LEDs, no displays, and no audible cues that could reveal operation. The device works silently, continuously transmitting audio information from the target area in real time.
Legal notice: The buyer is solely responsible for ensuring compliance with local laws and regulations. This product is supplied for technical evaluation, controlled testing, and lawful use only.
▸ Specifications
- • Device Type: Mini FM audio transmitter (radio microphone)
- • Audio Function: Live audio transmission only (no internal recording)
- • Factory Frequency: 77.0 MHz (pre-set)
- • Frequency Range: 76–110 MHz (user-tunable)
- • Operating Range: Up to 500–700 m (open area)
- • Microphone: 5 mm high-sensitivity electret microphone
- • Board Dimensions: 37 × 12 mm
- • Power Supply: 2× CR2032 lithium batteries
- • Operating Time: Approximately 6–10 hours
- • Power Control: No switch — ON when batteries inserted, OFF when removed
- • Country of Origin: Made in Israel
Battery notice: To preserve battery life, remove both batteries immediately after use. Leaving batteries installed will cause gradual discharge.
*Real-world performance depends on obstacles, RF noise, and the receiver used.
▸ Videos
▸ Frequently Asked Questions
▸ Does this device record audio?
▸ Is a receiver included?
▸ How do I know the exact operating frequency?
▸ How do I save the batteries?
▸ Is this product legal to use?
▸ What if I need help with setup or want to return the item?
Prefer purchasing through a trusted marketplace? This product is also available from our official eBay listing.
You will be redirected to our official eBay listing.
