4G Audio Listening Device – Compact, Discreet & Reliable

Professional 4G Remote Audio Monitoring – Listen from Anywhere in the World

Compact, powerful and designed for reliable performance, the Eyetek GSM 4G Audio Listening Device provides high-quality remote audio monitoring using the latest 4G mobile network technology.

Measuring just 80 × 40 × 18mm, this discreet, pocket-sized device combines advanced listening capabilities with exceptional ease of use, making it ideal for professional surveillance applications.

As Used by the Hunters in Channel 4's Hunted

This type of listening technology has been used by the hunters in the popular television series Hunted, demonstrating its effectiveness in professional surveillance operations.

Operation couldn't be simpler. Just insert a compatible SIM card, position the device in the required location and call its mobile number from your phone. The device automatically answers, allowing you to hear live audio from its surroundings, wherever you are in the world.

The sensitive microphone can pick up conversations and other sounds from up to 10 metres away, depending on the surrounding environment, without producing any audible ringing tones or alerts.

Purpose-Built for Professional Performance

Unlike modified mobile phones or basic consumer listening devices, the Eyetek GSMEB is a dedicated 4G audio monitoring system, professionally assembled in our own workshops.

Designed with reliability and discretion in mind, it offers straightforward operation without complicated applications, Wi-Fi connections or specialist equipment.

Automatic Sound-Activated Calling

For additional convenience, the device features an automatic sound-activated callback function.

When enabled, the unit can automatically call your designated telephone number when surrounding sound exceeds approximately 45dB.

This allows you to be alerted to activity without having to continuously call the device to check its surroundings.

Future-Ready 4G Connectivity

With 2G mobile networks being progressively phased out across Europe and scheduled for closure in the UK in the coming years, choosing a 4G-compatible listening device is becoming increasingly important.

Unlike older GSM listening devices that rely exclusively on 2G technology, the GSMEB operates using modern 4G LTE connectivity, helping to provide continued usability as mobile networks evolve.

The device supports both TDD-LTE and FDD-LTE technologies and is designed for use with compatible UK mobile networks, including EE, Vodafone, O2 and Three, subject to SIM compatibility, supported frequency bands and network coverage.

Rechargeable Battery – Up to 7 Days Standby

The built-in rechargeable lithium-ion battery provides up to one week of standby operation, depending on mobile signal strength, network conditions and usage.

Its compact dimensions make the unit easy to position discreetly, while the rechargeable design eliminates the need for regular disposable battery replacements.

Key Features

• 4G LTE connectivity – Supports TDD-LTE and FDD-LTE network technologies.
• Worldwide remote listening – Call the device from anywhere with a suitable telephone connection.
• Sensitive microphone – Captures audio from distances of up to 10 metres, subject to conditions.
• Sound-activated callback – Automatically calls your designated number when sound exceeds approximately 45dB.
• Silent operation – No audible ringing or notification tones when answering an incoming call.
• Compact design – Measures just 80 × 40 × 18mm.
• Rechargeable battery – Up to 7 days standby under suitable conditions.
• Simple operation – No apps, Wi-Fi or complicated configuration required.
• Professionally assembled – Built in our own workshops for dependable performance.

Eyetek GSMEB – Professional 4G Audio Monitoring Made Simple

Combining modern 4G connectivity, sensitive audio pickup and convenient remote access in one compact unit, the Eyetek GSMEB 4G Audio Listening Device offers a practical, reliable solution for authorised remote audio monitoring.

Product Code: GSMEB-4g