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GSM Double Plug Adapter

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Almost all homes and offices use an AC mains plug adapter to provide additional power sockets and to power appliances in the normal manner, but not all offer superhuman listening ability.  Simply plug the AC adapter into any mains wall socket as normal, and then dial the associated SIM card fitted inside the plug from any mobile or landline to clearly hear the surrounding audio.  Mains operated for unlimited use and optional sound detection feature notifies your smartphone in the event of audio.

Availability: In stock
Mains Powered GSM Plug Adapter; with LIVE Audio Listening & Sound Detection

The GSM Double Plug Adapter powers home and office electrical items in the normal manner however, fitted inside is a high sensitive audio microphone and GSM SIM card so you can, at any time, dial the SIM number from your smartphone or landline and listen to the surrounding room environment.

There are no distance restrictions - you can call the SIM number inside the adapter from anywhere in the world and the microphone can clearly pick up audio 25 feet away where the AC adapter is situated.  Audio quality is excellent - no humming, no cracking and no mains interference feedback.

The AC Listening Plug Adapter can be visually examined because externally, it is a normal looking adapter.  There are no batteries or recharging required, thus providing extremely long term audio surveillance.

Please be aware of poor quality products.  In principle they work, but cheap prices encourage shoddy workmanship.


This feature can be enabled / disabled by sending a coded SMS from your smartphone to the adapter.  Once enabled, the microphone monitors audio levels and calls your smartphone when sound is detected.  Sound detection is a smart way to understand when something may be untoward at your premises when you are absent.

Please Note: We will supply a pre-fitted SIM card however, if you purchase the optional Sound Detection feature which notifys your mobile phone when sound is detected then you will need to top-up the SIM card with credit (or any SIM card you use) in order to use the Sound Detection feature.


If you wish to record the audio that you hear through the GSM Double Plug Adapter then please consider the iPhone / Smartphone Mobile Call Recorder.

This product syncs with any mobile phone using Bluetooth so that the room environment that you are listening can be recorded onto the device.  It can also record and store both sides of a mobile phone conversation to the devices internal memory.

Simply enable Bluetooth on the Smartphone Call Recorder and enable Bluetooth on your mobile phone and sync both devices together.  Now, when you call the GSM Double Plug Adapter the call can be recorded.  Likewise, if you wish to make or receive any mobile phone call and record the call/s it is now possible.

The iPhone / Smartphone Recorder can be optionally purchased from the drop down menu above.

The GSM Listening Plug Adapter is a high quality product suitable as an additional security for your home / office / workshop / caravan / holiday home etc.

More Information
Can I use the plug adapter to power other electrical items?

Yes.  The plug is fully functional and operates just as a normal plug adapter.

How do I listen into my office?

Simply plug the adapter into any wall socket and then call the supplied SIM card number.  The microphone will enable and you will then be able to hear very clearly and monitor the audio surroundings where the plug is situated.

Instead of calling in all the time, can I get notified by the adapter when audio is detected?

Yes.  You will need the sound detection feature which we can implement for just £5.00 and can be purchased from the drop down menu.  This feature can be enabled / disabled remotely from your mobile phone by sending a simple coded message to the adapter.

What if I go overseas?  Can I still monitor the room back home in the office?


Will the adapter still work if it is removed from the wall socket?

No.  The plug obtains its power from the mains wall socket.  There are no batteries or recharging required with this unit.

Can I hear the entire room?

Yes.  The audio microphone is very sensitive which clearly picks up sound in almost all standard room sizes.

Will I hear buzzing noises or fuzzy mains feedback when listening in?

No.  The adapter is a high quality listening device built by professionals.

How long can I listen in for?

As long as you want to.  Bear in mind, your call to the adapter is the cost of a standard call to a SIM card.

When I call the number it goes to voicemail?

The SIM card is struggling to get a GSM signal.  Please change the SIM card to a different network with a better signal strength or move the plug to a different position.

Can I use the plug adapter outside the UK?

It is designed for use by 3-pin wall sockets operating 220 – 240 Volts.  If you require a device for your country please also see our European and USA audio plug sockets.

Is it possible to record the audio I hear?

Optionally, we offer a product which uses Bluetooth to sync the device with any mobile phone so that the room environment that you are listening can be recorded onto the device.  It can also record and store both sides of a mobile phone conversation to the devices internal memory.

For further details please navigate to the Smartphone Call Recorder found under Audio Surveillance ---> Call Recording.

The iPhone / Smartphone Recorder can be optionally purchased from the drop down menu above.

Technical Info
  • Fully functional mains powered plug adapter
  • Professionally hand built
  • Powers from the electrical mains supply
  • No batteries or recharging required
  • Unlimited standby time
  • Dial and listen from anywhere in the world
  • No LED’s / sounds / vibrations / moving parts – completely normal appearance
  • Quad-band worldwide operation – 900 / 1800 / 1900 / 1950 MHz
  • Audio microphone – approx 25 feet
  • Optional Smartphone Call Recorder
  • Supplied with GSM plug adapter, SIM card and User Guide
  • Ideal to monitor the audio environment of your home / office for safety when absent or evidential purposes
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There is still time to dispatch this product TODAY for delivery tomorrow providing the order is placed BEFORE 3pm Monday - Friday.  If the order is placed AFTER 3pm then dispatch will be the following working day.

Note: The closer to 3pm that an order is placed the more likely we dispatch by Royal Mail Special Delivery due to early collection by DPD.  Therefore, please do not select a DPD delivery option after 2:00pm.


Any order total above £100.00 (Ex VAT) qualifies for FREE shipping in the UK.  If the order total is less than £100 then a shipping fee of £8.40 is applied.

You can upgrade the speed of delivery as early as 10:30am the Next Working Day for the expedited fees shown below.  These fees will also be shown during the Checkout.

Note: If you wish to return an item the upgrade delivery fee is non-refundable in line with our legal Consumer Regulations.


All item/s are securely packaged with your name and address details only, and without reference to Online Spy Shop branding.

All deliveries regardless of the shipping methos we use will require a signature to release the goods unless you specify alternatively and at your own risk.


FREE delivery by DPD Courier up to 18:00pm.
Add £8.40 for delivery by 13:00pm.
Add £10.99 for delivery by 12:00noon.
Add £19.99 for delivery by 10:30am.


Delivery by DPD Courier up to 18:00pm.
Add £18.00 for delivery on Saturday.  Orders must be placed not later than 3pm on the Friday.


Delivery by various Couriers depending on destination.
£25.00 Standard fully tracked delivery up to six (6) working days.
£35.00 Express fully tracked delivery up to three (3) working days.


No shipping or delivery charges are applicable.