Spectrum Two Kit is here for a limited run!



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The CTX2 is a rectangular version of TINYTX's V1TX Audio Surveillance Transmitter, measuring only 25mmx 15mm with a thickness of .8mm.

-This Transmitter comes mounted with a button cell battery holder for a CR2032 battery (CR2032 will provide 24 hours of audio surveillance)

-No switches or indicator lights.

This is a permanent, always-on "hot-microphone", once the battery is inserted the CTX2 will begin live transmission of ambient and surrounding audio without interruption on the Ultra High-Frequency band. The CTX2 will broadcast audio over a distance of 500-800 metres in a cluttered urban environment, up to 1 kilometre with LOS, through concrete, drywall, and thick bush to any UHF receiver, it operates on a single button cell battery.

Use this transmitter to remotely listen to an area of interest that requires discrete acoustic monitoring. We recommend any handheld UHF receiver capable of tuning into the 400MHz-434MHz range, this is a standard range in most UHF receivers. Our recommended handheld receiver is the Baofeng UV-5R or the AnyTone AT-318UV. Your CTX2 will arrive with its specific Tx/Rx frequency noted on its


Power Supply Options1x CR2032 (3v) : 24 Hours Of Continuous Operation.

Dimensions: 15mm × 28mm x.8mm

Microphone100Hz ~ 20kHz Panasonic: Analog
Microphone Electret Condenser. Directional Characteristic: Omni-Directional
Sensitivity: -7.0 +4 (0 dB= fs/Pa@1kHz).
Signal to Noise Ratio: 78 dB Typ. at 1kHz.
Max Input Sound Level: 101 dB SPL Typ.

WeightWithout Battery: 8g

Output (RF) power12mW | 14mW

Antenna60mm OR 110mm: 1g Shielded.

Frequency Range430MHz-439 MHz, 2.5 kHz step.

Effective Range15m From Centre.

StabilityHighly Stable. Crystal Referenced Phase-Locked Loop.

Crystal: 00k/ASK Data Transmitter.


Check out the Jammer here: https://sapgear.com/products/jammer  

In order to maintain its longevity, the CTX2 is potted with a compound or wrapped in heat-shrink which seals all onboard components, only the microphone and the battery terminal are accessible and made visible.



LEGAL STATUS OF PRODUCTS: It is the responsibility of the buyer (not the distributor), to ascertain and obey all applicable local, state and federal laws in regard to possession and use of any items listed on this page. Consult an attorney or law enforcement professional, regarding local, state and federal laws before ordering. By placing an order, the Buyer represents that he/she is of legal age and that the products will be used only in a lawful manner.

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