One UHF transmitter with a fixed frequency marked on its storage box.
Compact live audio. A switch between standby and transmission.
A miniature UHF transmitter with a sensitive microphone, a built-in holder for two CR2032 cells and a labelled fixed frequency. Published maximum range: up to 700 m in open areas with a suitable receiver.
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Sound → microphone → UHF transmission → compatible receiver
Follow the demonstration to install the two included CR2032 batteries.
The 1 position selects standby. ON starts transmitting.
Tune a compatible UHF receiver to the value written on your transmitter’s box.
Up to 700 m (about 2,297 ft / 0.43 miles) is the published maximum in open areas. The illustration is not to scale and does not guarantee this distance through buildings. Obstacles, interference, antennas and receiver performance affect reception.
Spy-IL11 combines an electret microphone, a UHF transmitter and a built-in battery holder. The circuit board is 20 mm in diameter, with an approximately 15 cm flexible antenna.
Each unit is tested and supplied at a fixed frequency within 400–470 MHz. The exact value is handwritten on its plastic storage box. It is not a user-tunable transmitter.
Audio is transmitted live rather than recorded internally. The switch selects standby or transmission; the two modes have different battery-life specifications.
Battery installation, switching and UHF tuning.
The video describes two locations approximately 650 m apart in a straight line and uses a receiver tuned to the demonstration unit’s 458.205 MHz frequency. This is one demonstration, not a guaranteed distance for every setup.
Use your own box label when tuning. Optional English captions are available in the player.
With batteries installed, position 1 puts the unit in standby. The published standby time is up to 120 hours.
Move the switch to ON to transmit. The published transmission time is up to 12 hours. These are separate mode-specific figures, not 120 hours of audio transmission.
Battery quality and conditions affect actual time. Two CR2032 cells are included for an initial test.
Use the exact frequency on your storage box.
Receiver sold separately. Adhesive tape is not confirmed as included. Paper clip shown for scale.
No. Up to 120 hours applies to standby. The separate transmission specification is up to 12 hours.
With cells installed, 1 selects standby and ON starts transmission. Follow the video demonstration.
No. That is the example unit’s frequency. Tune to the value written on your own storage box.
This model is supplied at a fixed frequency. Tune the receiver to it rather than treating the transmitter as user-tunable.
Two CR2032 test cells and the labelled plastic box are included. The receiver is not included.
No. This is the published maximum in open areas. Actual range depends on the receiver, antennas, obstacles and interference.
No. It sends sound live to a compatible UHF receiver.
Ask Alex about the labelled frequency, receiver compatibility or operating modes.