Batteries, FM tuning and window mounting.
Watch the original footage with sound. It shows the batteries, radio setup, mounting and reception. The 104.2 MHz label belongs to the demonstration unit; use the frequency supplied with yours.
See the sensor, battery holder, antenna and glass mounting.
Glass vibration pickup / FM
Spy-IL14 Through-Glass FM Spy Bug
Glass vibrations.
Live FM audio.
A compact piezo pickup that attaches to window glass and sends the resulting audio to a separate FM radio. It senses vibrations in the glass, helping you hear sound from the other side.
$25.99 USD
FM 100–108 MHz2 × CR2032 includedMounting tape included
An FM receiver is required and sold separately. Use a radio covering 100–108 MHz and tune to the operating frequency supplied with your device.
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US shipping · $9.00 per item
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A different way to pick up sound
Start with
the glass.
Sound makes window glass vibrate. Spy-IL14 uses a piezo sensor in contact with that glass, amplifies the resulting signal and transmits it over FM for live listening through a separate radio.
Attach the sensor to the glass using the supplied double-sided tape. The device is tested and pre-tuned before dispatch; match your receiver to the frequency on its packaging.
Two CR2032 batteries power the device. An on/off switch lets you stop transmission when finished. The published continuous operating time is 24–48 hours, depending on conditions.
Glass pickupContact piezo sensor
100–108 MHzFM reception band
2 × CR2032Batteries included
20 mmCircuit board diameter
From vibration to radio
How it works.
Glass vibrations → piezo pickup → FM receiver
01
Attach to glass.
Use the included tape to keep the pickup in contact with the window.
02
Switch it on.
Fit the two CR2032 batteries and follow the supplied instructions.
03
Tune and listen.
Set your FM receiver to the transmitter’s labelled operating frequency.
Two distances, two different things.
The listing specifies sound pickup from sources up to 10 m (33 ft) from the glass, and radio transmission up to 200 m (656 ft). Neither is a guaranteed result: glass, contact, room acoustics, interference and receiver placement affect performance.
Watch before you choose
See the complete setup.
Original Full HD demonstration · 3 min 26 sec
At a glance
The details,
clearly laid out.
Contact pickup from glass, with a separate FM radio for listening.
A suitable standard FM radio covering the labelled frequency can also be used.
- Model
- Spy-IL14
- Audio pickup
- Contact piezo sensor; glass vibrations
- Transmission
- Live FM audio
- FM band
- 100–108 MHz
- Operating frequency
- Identified on your unit’s packaging
- Published radio range
- Up to 200 m / 656 ft; depends on conditions
- Specified source distance
- Up to 10 m / 33 ft from the glass
- Circuit board diameter
- 20 mm / approx. 0.79 in
- Power supply
- Two CR2032 lithium batteries, included
- Specified working time
- 24–48 hours continuous operation
- Antenna
- Approx. 70 cm / 27.6 in; 0.4 mm insulated wire
- Controls
- On/off switch and tuning capacitor
- Mounting
- Double-sided tape, included
- Receiver
- Separate FM receiver required
- Manufactured in
- Israel
Your package
What arrives.
- One Spy-IL14 through-glass FM device
- Attached antenna and built-in battery holder
- Two CR2032 lithium batteries
- Double-sided mounting tape
- Protective storage case
- Tuning instructions
Receiver sold separately. The package photographs show an example frequency. Your unit’s frequency is identified on its packaging.
Good to know
A few clear answers.
Does it work through glass or a solid wall?
The documented operating principle is contact pickup from vibrating window glass. Performance through solid walls is not established by the supplied description, so this page describes through-glass use.
What receiver do I need?
An FM radio that covers 100–108 MHz and can tune to the supplied operating frequency. A receiver is not included. The recommended FM receiver covers 63–108 MHz.
Does it record audio?
The described function is live FM audio transmission. Listening takes place through a separate receiver.
What do the 10 m and 200 m figures mean?
Up to 10 m refers to the sound source’s distance from the glass. Up to 200 m refers to radio transmission distance. Actual results depend on the installation and conditions.
Are batteries and mounting tape included?
Yes. The selected listing includes two CR2032 batteries, double-sided tape, a protective case and tuning instructions.
Can I change the transmitter frequency?
The unit is pre-tuned before dispatch. Although a tuning capacitor is present, the listing recommends leaving its adjustment unchanged. Use the supplied instructions and contact Spy-IL if you need help.
How long does it operate?
The specified continuous operating time is 24–48 hours. Switch it off after use, then remove the batteries and store them separately.
Is 104.2 MHz the frequency of every unit?
No. That is the example shown in the footage and photographs. Tune your receiver to the frequency identified on your own packaging.
Have a setup question?
Ask Alex about the glass pickup or FM receiver compatibility.