Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
CTX3
CTX3
CTX3
CTX3
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
CTX3
CTX3
CTX3
CTX3
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
CTX3
CTX3
CTX3
CTX3
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
Tiny Ultra High-Frequency Acoustic Surveillance Transmitter. Packs 30 hours of continuous audio transmission. Covert wireless Audio Surveillance Transmitters, more commonly known as "Spy Bugs", these tiny transmitters are made in Canada, and are capable of transmitting audio wirelessly via UHF over long distances. TinyTx manufactures professional spy equipment.
CTX3
CTX3
CTX3
CTX3

CTX3

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  • $391.88
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Introducing the CTX3, our most compact transmitter to date and likely the smallest UHF Audio Surveillance Transmitter available worldwide. With dimensions of only 6.39mm x 18.56mm and a thickness of 0.8mm, the CTX3 sets a new standard in size efficiency. This transmitter is now available in a new SMD package crystal generating 20mW of RF power, ensuring superior frequency stability and delivering enhanced audio sensitivity.

The newest CTX3 provides over 30 hours of continuous audio surveillance, this model accepts standard alkaline CR2032 button cell batteries. Alternatively, the CTX3 is available as a standalone device with the (+) / (-) terminal pads tinned, allowing you to attach your own power or battery supply (ranging from 3V to 3.7V). This flexibility opens the door to virtually limitless operational time, enabling you to customize the power source to meet your specific needs. 

The CTX3 features a discreet design without switches or indicator lights, ensuring covert operation.

Once the battery is inserted, the CTX3 functions as a permanent, always-on "hot-microphone," immediately initiating live transmission of ambient and surrounding audio without interruption on the Ultra High-Frequency band. In a cluttered urban environment, the CTX3 broadcasts audio over a distance of 700 meters, extending up to 1.2 kilometers with Line-of-Sight (LOS) transmission. It effectively transmits audio through obstacles such as concrete, drywall, and dense vegetation.

Use the CTX3 for discreet acoustic monitoring of areas of interest. We recommend utilizing any handheld UHF receiver capable of tuning into the standard frequency range of 400MHz-434MHz, which is supported by most UHF receivers. For optimal performance, we suggest the Baofeng UV-5R or the AnyTone AT-318UV as our recommended handheld receivers. Additionally, you can also use any of our transmitters with SDRs (Software-Defined Radios). Your CTX3 will arrive with its specific Tx/Rx frequency clearly noted on its back, ensuring seamless compatibility with your receiver of choice.

Power Supply Options

1x Lithium-Ion 2032  (3.7V) : ~34 Hours Of Continuous Operation.

1x CR2032 (3v) : ~30 to 34 Hours Of Continuous Operation.

1x 2600 mAh 18650 (3v) : 260 Hours Of Continuous Operation.

1x 3600 mAh 18650 (3v) : 360 Hours Of Continuous Operation.

2x AA Alkaline (3V) : 210 Hours Of Continuous Operation.
Dimensions 6.39mm x 18.56mm x .8mm
Microphone

CUI: 100 Hz ~ 20 kHz Analog Microphone Electret Condenser Omnidirectional (-42dB ±3dB @ 94dB SPL)

KNOWLES BJ-21590: 300 Hz ~ 5 kHz Analog Microphone Magnetic Omnidirectional (-75.5dB ±3dB @ 74dB SPL)
Weight 1g
Output (RF) power  20mW
Antenna Alpha Wire 8 in. Micro Coaxial Cable 38 AWG
Frequency Range

433MHz-439 MHz, 2.5 kHz step.
Effective Range 15m From Centre. 
Stability  Highly Stable. Crystal Referenced Phase-Locked Loop.
Crystal 00k/ASK Data Transmitter.

 

In order to maintain its longevity, the CTX3 is potted with a compound that seals all onboard components, only the microphone and the battery terminal pads are accessible and made visible.

We can design for your needs. TINYTX has designed and manufactured hidden and covertly disguised audio surveillance transmitters for several client projects and applications. Contact us for turnkey solutions.