Black VOX GSM – Live Listening Device, Knowles Microphone

Product Code: PBNGSM1K

The Black VOX GSM Live Listening Device is a long-term audio bug that can provide the ability to listen ‘live’ to what is happening in the environment where it has been placed. With a standby battery of 19 Days and call time of 16 hours, Black Vox GSM has a built in Knowles Microphone for crystal clear sound quality upto 10 Metres away from the device in all directions.

Built in the UK, the Black Vox is a formidable device which can operate on all networks worldwide – Quad band – (850, 900, 1800 or 1900MHz)

Superb Microphone – Discreet Auto-answering

The Black VOX GSM Live Listening Bug requires a mobile phone SIM card inserted within so that it can be called from anywhere in the world, if required. When the number of the inserted SIM is contacted, the device will, without alerting attention in any way, auto-answer the call and open up its in-built sensitive microphone which will enable the caller to listen into the surroundings up to 10 metres away. The Black VOX GSM delivers best in class audio quality, supporting features such as magnetic housing make covert deployments in offices and cars and other difficult environments, fully accessible.

Exceptional Battery Saving Technology

The BLACK VOX GSM Live listening device is exceptionally compact measuring just 73mm x 31mm x 22mm, this tiny device still manages to function for an impressive period of time. The internal lithium ion rechargeable battery pack will give a combination of up to 19 days standby time and up to 16 hours of listening-in time (optimum conditions), Exceptional Performance.

Programmable Sensitivity and Sound Activation – Live Listening Device

Black Vox GSM has quad-band capability which means that it can be used in every country worldwide. In addition, the product also features a voice activation facility, with sensitivity setting (sends SMS notification when sound is detected in vicinity of device), adjustable microphone sensitivity to suit the environment the unit is placed within. These can be programmed remotely or adjusted using a coded text message. Remote Command settings are detailed in the user manual.

A Listening Bug Made for Discreet Deployment

The unit is best deployed in a position where it can pick up sounds in the environment where it has been placed. If placed in a room in a house, then a surface above head height would be ideal where it would be less likely to be discovered (possibly on top of a cupboard or curtain pelmet). In an office then maybe the opportunity to use the attached magnets to attach to the metal frame of a desk. If hidden inside a vehicle then a good position maybe secured under one of the front seats where the device would still pick up on sounds inside the vehicle, but remain out of sight. The sound activation is best used in a normally quiet environment or just as an alert for an event such as someone entering a room or someone getting into a car. It should be noted that using the voice activation facility will require credit on the inserted SIM (or a contract SIM being used).


Superb compact battery powered GSM listening device built into a black box enclosure

  • Call this listening device from any mobile phone or landline – unit will auto-answer
  • outstandingly crisp audio quality – Knowles microphone has adjustable sensitivity that can even be controlled remotely (by coded SMS message)
  • Totally discreet operation – auto answers without any alerts (lights or noise)
  • External on/off switch – charge and save battery charge before deployment
  • Simple to use ‘plug and go’ technology – No specialist technical knowledge required
  • Internal Lithium Ion rechargeable battery (1200mAh) – charger supplied
  • Up to 19 days standby time – Up to 16 hours listening-in time (battery life maximizes after 3 to 4 full charge/discharges)
  • Can be deployed plugged into a live mains power outlet for a more permanent solution
  • Quad-band operation – accepts any GSM network SIM (850, 900, 1800 or 1900MHz) covering all countries worldwide
  • Designed to work with any activated micro SIM card
  • Unit dimensions: 73 mm (incl. switch) x 31 mm x 22 mm (incl. magnets) – extremely lightweight
  • Includes magnetic USB charging lead
  • Perfect standalone listening bug suited for deployment inside a vehicle or out of site in a room environment


You will need a working mobile phone to enable you to listen in to the bug and adjust its features if necessary

This unit can take permanent power from a mains and remain switched on ready to use.

To be able to take advantage of the voice activation facility and SMS alerts, the SIM card inside the Black VOX GSM will require credit or will need to be a contract SIM.

Just like any mobile phone the Black VOX GSM can lose network signal in certain situations, when deployed inside a moving vehicle that is travelling through varying signal strength areas

Frequently Asked Questions

As long as the device is in the airspace of the environment where conversation is taking place and the microphone holes are not covered, then it will pick up on these voices

The unit is totally covert. The unit will give no visual or audible indication of the battery’s expiration.

This listening unit has a quad-band modem and therefore will work anywhere around the world on the GSM networks 850, 900, 1800 and 1900MHz bands.

These units have been designed to accept standard size SIM cards from any network, although of course it has been impossible to test every network SIM provider around the world and these are designed for the 2G network, to ensure you obtain the right sim card contact your reseller or accept the one provided by the reseller which will be tested to work in your country.

Although the device is not immediately a giveaway, a simple examination by somebody with basic common sense would reveal that it was more than a plain black box. It is best to place it in a position out of immediate view.

Yes, the unit will accept calls from both types, but to make use of the voice activation facility only a mobile phone can be used.

Additional Information