Best Selling Professional GSM spy listening device with adjustable sensitivity & Auto Callback

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  • £49.99
  • Regular price £69.99

The bestselling professional listening device is exclusive to us & used by domestic and security professionals all over the world. Our genuine professional version has extended battery life, voice activation mode, adjustable sensitivity and two superior microphones. Device doesn't make any sounds and has no external lights so no one will suspect your listening in. You only get one chance to capture that sound, so don't throw it away with an inferior copy!

All you have to do is insert a sim card, position the device, send it a simple text and you’re ready to call it up at your convenience or it can call you, when it detects talking or increased activity. It really is as simple as that.

It’s a third smaller with the same great performance as the previous version. Device has a new smaller, more compact shape at just over 4cm in length. This is amazing that such a small device will pack this great quality listening device. As this exclusive product is sourced from the genuine manufacturer, it has great sound monitoring via two microphones, with the benefit of a simple, flexible setup and unlike cheaper copies, this has adjustable sensitivity. Therefore, this device can be used in more scenarios, loud, quiet, busy, there is a setting to suit. Take the gamble out of purchasing the right product as this is a superior product with a great pickup.


At a Glance
Upgraded aerial, often works where other devices struggle to get a GSM signal

Auto Dialling option with adjustable sensitivity 30 - 100db

Upgraded Quad-Band GSM Audio Spy Device

Runs off GSM technology using the same technology as GSM mobile phones.

Standard Micro USB connector for charging or power bank connectivity

Auto call back to alert you when sound is detected in the area

Microphone Range: up to 8-meter radius

Power: Built In 500 mAh Rechargeable Li-ion Battery

Improved professional features include:

1) Auto-call back function so device calls you when it detects sound therefore, removing the need to constantly listen

2) Dual microphone for clearer monitoring of surrounding area

3) Improved aerial, to enable reception in areas other devices struggle with

4) Adjustable sensitivity, (30-100db) for auto call back feature by simply sending a text. This feature is brilliant in areas with lots of background noise, stops you being called unnecessary

5) Standard Micro USB cable connectivity, no more relying on a bespoke cable

The device can automatically call you when it hears talking or increased activity. Alternatively, you can easily switch the devices operation to call the device at your convenience.
Just send a text to the secret gsm spy bug listening device and it will call you back. Put the phone down when you have finished listening & it will call you again when there is more activity. You can hear this GSM spy device from anywhere in the world.

When you call the mobile number, this device will auto answer. You can hear talking or whatever you are listening for when you call in to the sim card. Useful at home with the babysitter, teenager, protecting your car etc. No flashing lights or sounds when activated by your call

This two-way gsm spy bug listening device comes with two amazing functions:
(1) Make a call to the sim card spy bug and you can instantly listen in to conversations! The built-in microphone works up to 8-meter radius, so set this bug up wherever you want!
(2) Allows the spy audio device to call you when it hears people talking! This feature makes it much more advanced than most other GSM audio bugs on the market today.


500mAh Rechargeable Li-ion Battery

Auto-call back current:30mA

Standby current:2.5mA

Listening current:150mA

Working Time: up to 3 hours continuous listening

Standby Time up to 3 days

Voice Control on: up to 2 days

All estimates are based on a fully charged battery, activity (listening time) with an ideal reception.


Dimensions: 41x 23 x 14.5mm

Package includes: GSM listening device, USB charging cable, basic instructions


To use the features on this product you will require a compatible GSM sim card once you have tested ok put some credit on the sim to ensure that the network keeps it active.

It's always best to stick with a network that you know has a decent reception in the area that the product is being used, we normally recommend EE, Vodafone, Virgin or Lebara in the UK as these have good network coverage. Device works with most GSM networks across the world.

O2 & the 3 Network sim cards will NOT work with listening devices as they are mainly 3g sim cards.

You can add a compatible GSM sim card to your purchase by selecting from here Sim Cards and Add to Cart.


Warning: This product should not be used for any illegal purposes; you may be subject to prosecution under applicable laws.
It is illegal to make recordings (audio/visual) of any person(s) without their prior knowledge and/or consent.