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GSM Landline Master

Product Code LLM4

An excellent multi-funtional GSM listening device that is designed to allow you to remotely monitor all incoming and outgoing landline calls as well as providing a room audio surveillance remote listening device.

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All parcels are discretely packaged and addressed with no mention of Spy Equipment UK or Spy branding. All parcels must be signed for and can't be left at a property without a signature. No shipping is required for Software/Subscription Products

UK Delivery Options
£2.75 - UK Standard (Up To 3 Working Days)
£6 - UK Standard (Up To 3 Working Days)
£7.50 - UK Special Delivery (Next Working Day - before 13.00 hours)
£26 - UK Express (Next Working Day - before 09.00 hours)
£16 - UK Saturday Delivery (before 13:00 hours)
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Europe Zone 1( Express )
£25 - Europe Zone (1 to 2 working days )
Europe Zone 2 ( Express )
£32 - Europe Zone 2 (1 to 3 working days )
Europe Zone 3 ( Express )
£38 - Europe Zone 3 (1 to 3 working days )
Worldwide Zone 1
£43 - Worldwide Zone 1 ( 2 - 4 working days )
Worldwide Zone 2
£48 - Worldwide Zone 2 ( 3 - 5 working days )
USA & Canada
£33 - USA & Canada ( 1 - 3 working days )
Product Code

£ 286.80 inc. VAT£ 239.00 ex. VAT

Order in the next hours for expected UK delivery before 18:00 on Tuesday 18th June

The GSM Landline Master is a multi-functional call monitoring device that simply connects to any standard BT style landline socket, meaning you can listen-in ‘live’ to all incoming and outgoing calls from anywhere in the world. This GSM Listening Device is an advanced piece of equipment that provides the user with crystal clear results.

Connect this GSM Listening Device to ‘Live’ Outlet

Part of our wider GSM listening bugs range, The GSM Landline Master works in a discreet manner and as such simply works away in the background without causing any interference to the functionality or call quality of the landline to which it has been attached. The GSM Bug can be plugged into any ‘live’ socket on the line being monitored, which means that if there is a spare working telephone wall outlet hidden away from view, then this would provide the ideal connection point for discreet deployment of the product. Alternatively, the device can be connected to the same outlet as the landline phone using a two-way line splitter.

Easy Setup – Call Surveillance in Real Time

This GSM Listening Device is very easy to set up and use and after set up the whole unit can be remotely managed via SMS commands from your predefined number. The GSM Landline Master operates on tri-band frequencies which means that it is possible to use it across the majority of the globe. It can be set to call a predefined number of your choice upon detection of a call on the line. When the device detects the call, it will dial the preset number and it is then possible to listen in to the landline call from that preset number, which could be a mobile phone of another landline in ‘real time.’ An added feature with this GSM listening bug is the ability to call into the device and listen through an internal microphone to the environment that it is located in.

Record Calls for Evidence and Playback with This GSM Bug

Although this GSM Bug has no recording facility built in it is possible to record what you are hearing if the content of the call is very important to you. Record remotely using Bluetooth Call Recorder paired with your Smartphone via Bluetooth, with time and date facility providing backup as to the validity of the recording. The result will be the ability to remotely record landline conversations for evidential purposes.

  • Connects to any landline socket (NOT multi-line or PABX system)
  • Landline monitoring of home/office calls through the GSM network
  • Immediate notification when incoming/outgoing call is activated on the landline
  • Choose to listen-in or reject the call
  • In-built vibration sensor alerts you if the unit is tampered with
  • External IR sensor alerts you to movement around the unit
  • In-built microphone for audio monitoring of the surrounding environment (approx. 5 meters)
  • All Features can be managed remotely
  • Power Consumption: 36 hours Standby : 2.5 hours talk time (using internal battery)
  • Power Supply: 3.7v @ 580MAh – AC Power Connector supplied
  • Tri band – 900MHz/1800MHz/1900MHz
  • Dimensions: 62mm x 40mm x 20mm

Can this GSM listening device hidden away inside of the wall socket?

No, this device can only be plugged into a ‘live’ wall socket of the landline that is to be monitored.

Would the person using the telephone line know that there is somebody else listening in?

No, the device gives no alert in any way shape or form to the landline user that the call is being monitored by a third party.

Can this GSM Bug record the calls made on the line to which it has been attached?

The device itself cannot record the calls. It is only designed to contact a certain pre-programmed number, however, it would be possible to record what is being heard remotely if a call recording system was set to do this on the call receiving device.

How much does it cost for the device to call the pre-programmed number?

This depends on a number of factors including what network SIM card is in the device and whether the pre-programmed number is a mobile phone number or a landline number. Some network providers give very low cost or even free calls within the same network for specified numbers.

Can the GSM listening bug be permanently attached to the mains power to save using the rechargeable battery?

Yes, there is a mains power charger/adapter supplied for this purpose.

You will need to consider the following to use this equipment:

  • This device has an inbuilt rechargeable battery to provide power, but alternatively this device can also be powered more permanently from a mains supply.
  • No SIM card is supplied with the product, although it is desigbned to accept any network standard size SIM
  • The device has to be plugged into a wall socket which means for more discreet operations it is best to either disguise the device or plug it into another ‘live’ wall outlet on the same phone line.