About Us

JJN Electronics Limited is a leading UK manufacturer of Professional Counter Surveillance (TCSM) Equipment. We are an innovative dynamic company, with a reputation for designing highly effective detection equipment with a customer focused approach.

JJN Digital products are designed and built in the UK to the highest specification and are used by countermeasures professionals worldwide. Our clients include government, police, prisons, businesses, and professional sweep teams.

Company Background

JJN Electronics was formed in 1996 as a manufacturer of specialist electronic surveillance equipment. In its early years the company developed a reputation for producing high specification audio surveillance devices that became widley regarded as the most sophisticated products on the market in terms of sound quality, transmission capability and reliability. These devices became industry standard surveillance equipment for high-level clients such as government agencies and security forces. The quest for longer transmission ranges lead JJN to become pioneers in developing ultra-miniature GSM audio devices with no transmission range limitations.

Product enclosure concept and styling

In 1998, following a customer request, our knowledge and expertise of radio transmission technologies lead us to develop our first Wideband Radio Frequency Detector or 'Bug Detector' the PRO5000D. The product was received with great acclaim for its small size, high end performance and simplicity of use. Since then we have tirelessly continued to develop a range of counter surveillance products that give users the power to detect the latest types of devices as they come to market. Over the past two decades, with rapidly developing technologies, the challenges facing JJN included detecting conventional VHF/UHF listening devices, wireless video devices, GSM, GPRS  3G and 4G devices, GPS tracking devices, frequency hopping, spread spectrum devices and SHF (Super High Frequency) devices. More recently the latest detection challenge has been the new ultra fast 5G cellular network and the latest ‘Store and Forward’ Wi-Fi/Bluetooth based devices.

Circuit design and layout

Our mobile phone detection products are now being used in environments where mobile phone usage is prohibited, such as boardrooms, prisons, hospitals, exam halls etc. Our high sensitivity detectors allow users to be instantly notified of unauthorised mobile phone activity and to locate the position of the target phone.

Product enclosure design in CAD package

In 2013 JJN Electronics Ltd launched a new brand - 'JJN Digital'. Since then we have been developing a range of flagship detection products under the JJN Digital brand offering the highest possible technical specification whilst never forgetting that our products should remain simple and intuitive to use and should not require any formal technical training.

Quality UK Manufactured Products

We are proud of that fact that our products are manufactured in the UK using the highest quality, professional grade components and processes. All assembled circuits are fully tested and calibrated before final assembly. All units are then tested on completion and every product is finally tested once more before dispatch. In the unlikely event of a manufacturing defect we offer an unconditional guarantee on all products for 12 months. We can say with confidence that there is no reason why a JJN Digital product will not give you many years of reliable service.

Fast Delivery Worldwide

We use Fedex Express for all our international and UK deliveries. If you are based in the UK or mainland Europe this means next-day delivery in most cases. For the rest of the world deliveries normally take 2 to 5 days. Contact us if you have any questions about delivery.

Compliance Documents

Please click here to view our Compliance Documentation.


The CAM-GX5 Cellular Activity Monitor is a handheld multiband cellular signal detector ready for the latest generation of 5G devices (as well as existing 2G, 3G & 4G), plus the latest WiFi/Bluetooth devices.


The PRO-W12DX handheld wideband RF Detector is designed to detect and locate signals from the very latest covert listening, tracking, cellular and video devices

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