Covert communication headsets (covert)
Communication systems for covert investigations
We offer a wide range of products for discreet communication, specifically tailored to the requirements of security agencies and security organisations. Below you will find our various systems for covert investigations, such as induction sets, transduction systems and the Roger Covert wireless Bluetooth observation system. All systems can be adapted for analogue and digital radio devices.
inductive kits
Induction set with neck coil and cylinder PTT transmit button
Induction set with neck loop with integrated microphone and offset cable with cylinder transmit button.
A cable runs from a small junction box to the inductive neck loop with built-in, high-quality Knowles microphone for clear voice transmission and protection against RF interference. A second cable runs from the junction box to a cylinder-shaped PTT (push-to-talk) button.
Induction set 3-wire kit, black, with neck coil and cylinder PTT transmit button and microphone
3-wire induction set with neck coil, cable with microphone and cable with cylinder transmit button. All cables and components in black. The neck coil is available in 2 sizes.
A cable leads from a small junction box to the inductive neck loop, the second cable leads to the microphone with clip and the third cable leads to the PTT cylinder transmit button.
3-wire kit in beige with microphone, talk button and jack socket
This personal protection kit consists of three cables with PTT, microphone and a 3.5 mm jack socket, to which any headphones can be connected. For example, normal single-sided earphones or double-sided headphones. A sound tube headset can also be connected.
When connected to an induction coil and used with an induction headset, the 3-wire kit becomes a fully-fledged induction set or covert headset.
Available for all standard radio devices!
Phonak Phonito Nano induction headset
Induction headset for concealed wearing from Phonak with long-established and proven induction technology. The microphone is housed in the Y-splitter. The headset is equipped with an external wireless talk button. The receiver is extremely small, allowing it to be positioned discreetly in the ear. An optional jack allows it to be used with conventional headphones. Phonito Nano hearing and speaking headsets can be used with a wide range of professional radio devices (including the latest TETRA models from Motorola, Sepura and Hytera). The Phonak Bluetooth (BT) module offers a special connection that allows the Phonito Nano to be used with BT-enabled communication terminals.
More information
Induction set Imtradex OnGuard II / OnGuard III
Induction set or hearing aid with induction coil that transmits the audio signal to an induction receiver. The receiver is very small, so the headset can be worn very discreetly. The microphone is integrated into the transmit button on the OnGuard II (2-wire kit). On the OnGuard III, the microphone and coil are separate (3-wire kit).
Induction set Imtradex OnGuard IV
Induction set or Kripogarnitur with induction coil, which transmits the audio signal to an induction receiver. The coil is sewn into a flat fabric pouch so that it can be positioned perfectly under clothing. The receiver is very small, allowing the set to be worn very discreetly. The microphone is integrated into the transmit button.
Induction set Imtradex Clear+
Induction kits with wireless PTT transmit buttons
Induction headset with neck coil and wireless PTT transmit button
Designed for covert applications, with minimal cabling for the user to carry. From the specific radio connection, a cable leads to a small housing containing an encrypted wireless receiver that is paired with a wireless PTT transmit button.
The microphone built into the coil end enables clear voice transmission.
Induction headset with neck coil and wireless PTT transmit button
Designed for covert applications, with minimal cabling for the user to carry. A cable runs from the specific radio connection to a small PTT (Push To Talk) housing, which contains an encrypted wireless receiver that is paired with a concealed car key with 2 wireless PTT buttons (available with VW, Toyota, Peugeot and Nissan labels). The wireless PTT supports voice transmission and tone generation.
The induction kit is equipped with a high-quality Knowles microphone, which ensures clear voice transmission and protects against high-frequency interference.
Also available with a wired transmit button!
Induction set with flat coil and wireless PTT transmit button
Designed for covert applications, with minimal cabling for the user to carry. A cable runs from the specific radio connection to a small PTT (Push To Talk) transmitter housing, which contains an encrypted wireless receiver that is paired with a concealed car key with 2 wireless PTT buttons (available with VW, Toyota, Peugeot and Nissan labels). The wireless PTT supports voice transmission and tone generation.
The induction kit is equipped with a high-quality Knowles microphone
that ensures clear voice transmission and protects against
high-frequency interference.
Version with wired transmit button also available!
*** Translated with www.DeepL.com/Translator (free version) ***
Induction sets for smartphones
Induction set with 3.5 mm 4-pin jack plug with CTIA smartphone assignment
This personal protection kit can be easily used with a smartphone. It connects to the mobile phone via a jack plug. If your smartphone does not have a jack socket, we can also supply adapters, e.g. for USB-C sockets.
The microphone is located at the end of the coil. This allows you to work discreetly with your mobile phone and no talk button is required. The audio signal is quieter than with radio devices, so use in noisy areas is not recommended.
The coil is compatible with all our standard induction headsets for radio devices!
Item no.: HS-103-02
Induction receiver for the above induction systems
induction ear receiver
Various induction receivers (often referred to by users as earwigs) are available as replacements for existing hearing aid sets.
The receivers can be used immediately without registration. Our induction receivers can also be purchased at a discounted replacement price. To do so, you must return a defective receiver to us and you will receive a brand new receiver at a better price!
Item no.: various, e.g. PT-103-29
Phonak Phonito Nano induction ear receiver
Phonak Phonito Nano replacement induction receiver. The Phonito Nano from Phonak is the world’s smallest mini receiver for undercover investigators. With its tiny design, secure fit and range of colours to match different skin tones, the Phonito Nano is invisible to the naked eye. These features guarantee that the user remains undetected, increasing the chances of a successful operation.
Phonito Nano is available in beige or dark brown. The invisible, inductive mini receiver is equipped with the new hybrid audio chip. This allows the user to benefit from unrivalled sound quality and use the Nano earpiece with all standard induction loops on the market.
Transduction kits
Phonak Profilo Nano transduction set
Transduction set for concealed wearing with transduction technology developed exclusively by Phonak. This technology completely eliminates background noise. The interference caused by magnetic fields, which is common with induction systems, is no longer an issue.
The microphone is housed in the Y-splitter. The set is equipped with an external wireless talk button. The receiver is extremely small, allowing it to be positioned discreetly in the ear. An optional jack allows conventional headphones to be used.
More info…
Transduction hearing Profilo Nano
Replacement transduction receiver Phonak Profilo Nano. The Phonak receiver is the world’s smallest in-ear receiver for covert communication. Thanks to transduction technology, it is completely immune to electromagnetic interference, ensuring that you won’t be detected and won’t miss a single message.
Crackling and noise in the ear caused by electromagnetic interference (EMI) from alarm systems, vehicles and other electronic circuits can quickly lead to instructions not being heard, thus thwarting covert investigations. The same applies to earpieces that are so large and visible that they attract attention.
More info…
Wireless Bluetooth induction sets
Wireless Bluetooth PTT transmit button adapter
Wireless PTT transmit button adapter with clip for our BT radio dongles or other Bluetooth devices such as smartphones. The adapter has a built-in microphone and a 3.5 mm jack socket for connecting conventional headphones or headsets. This means that earphones or our Near special earphones can also be connected. The adapter detects when a headset is connected and automatically switches from the built-in microphone to the headset microphone. This means that our adapter can also be combined with our ear microphone system or induction system, for example.
This provides you with a modular system that can be used for personal protection as well as for covert wear during surveillance. What’s more, you can switch back and forth between your mobile phone and radio at any time. It’s pretty close to being a jack of all trades…
The adapter has buttons for volume control and call answering when making calls. In addition, our wireless external PTT buttons can also be used. When used with a smartphone, the PTT button can be used for various PoC apps such as Zello, Taasta, Wave PTX, Airbus Agnetwork, BTTALK, Buddycom, Grouptalk, Tait, Zebra, and many more.
The talk time is up to 10 hours, the standby time up to 50 hours. The adapter’s battery is charged via a USB port. A USB cable (without 220V plug adapter) is included in the scope of delivery.
Dimensions: 65 mm x 30 mm x 12 mm, weight: 22 grams
Item no.: HS-201-05
Induction set with integrated microphone with 3.5 mm 4-pin jack plug with CTIA smartphone assignment
This personal protection headset is simply connected to the wireless Bluetooth PTT adapter above. This creates a wireless induction headset for concealed wearing!
The microphone is located at the end of the coil. Switching to this is done by inserting the jack plug.
A small induction earpiece is also required for this. The coil is compatible with all of our standard induction earpieces, which are also used for radio devices!
Please contact us for further combination options.
Induction coil without microphone with 3.5 mm jack plug, 3-pin assignment
This personal protection headset is simply connected to the wireless Bluetooth PTT adapter above. This creates a wireless induction headset for concealed wearing!
The coil does not have a microphone, i.e. the adapter’s microphone is used.
A small induction earpiece is also required. The coil is compatible with all of our standard induction earpieces, which are also used for radio devices!
Please contact us for further combination options.
Imtradex BlueTalk 2.0 Clear+ earpiece set for mobile phones or smartphones
For police, security services and investigators, Imtradex offers OnGuard BlueTalk Clear+, a solution that can be worn covertly. It connects wirelessly to the investigator’s mobile phone. Calls can be answered, initiated or ended using a wireless transmit button, and thanks to integrated batteries, it can be used for hours on end.
In combination with a neck loop, an MP3 headset or a professional neckband headset, Imtradex guarantees maximum performance – for demanding applications.
Wireless surveillance kit with radio receiver
Phonak Roger Covert C wireless receiver set for mobile phone OR radio
The Roger Covert from Phonak no longer has an induction or transduction coil. This means that this observation set can be worn even more comfortably under clothing. The very small in-ear receiver does not require a coil and receives the radio signal from the base unit. This is connected to a mobile phone or Bluetooth-enabled radio device via Bluetooth.
Phonak Roger Covert Dual C wireless receiver set for mobile phones AND radios
The Roger Covert from Phonak no longer has an induction or transduction coil. This means that the observation set can be worn even more comfortably under clothing. The very small in-ear receiver does not require a coil and receives the radio signal from the base unit. This is connected to a mobile phone or Bluetooth-enabled radio device via Bluetooth. In the dual version, the radio can also be connected via cable and radio plug. This allows the user to work with both devices (i.e. the telephone network and the radio network) at the same time.
More info…
Phonak Roger Covert wireless receiver
Replacement Roger Covert Earpiece C wireless receiver. The ultra-small, encrypted Roger Earpiece C in-ear receiver is ideal for people who work in environments where discretion and confidentiality are key. The wireless receiver can be easily concealed in the ear and is virtually invisible from the outside. It offers unrivalled sound quality and speech intelligibility, ensuring that not a single syllable of the transmitted information is lost at crucial moments.
Accessories for miniature receivers
Softwraps for miniature wireless receivers
Adhesive strips for induction, transduction or Roger receivers. For adjusting the earphones for an even better fit and hold in the ear.
Pack of 10 foam strips
Item no. PK-103-97
Plastic cover for miniature wireless earphones
Cover for induction, transduction or Roger receivers. For an even better fit in the ear, especially for small ear canals. The improved seal also prevents feedback. Made from soft, thin silicone. Can also be cut to size for a perfect fit.
Item no. PT-610-05
Accessories for in-vehicle communication
Roger CarKit C – for wireless communication in vehicles
The Roger CarKit C vehicle kit from Phonak is a unique, state-of-the-art encrypted radio transmitter that has been specially developed for covert use in vehicles. Roger CarKit C is capable of operating two different audio sources simultaneously (e.g. two mobile phones).
If conversations from both sources are transmitted at the same time, they are mixed together.
The Roger CarKit C transmits the signals digitally and with AES 128-bit encryption either directly to a
Roger Earpiece or a Profilo WL-Kit DM (transduction).
Expansion of the Roger System
Roger On C – Audio conversation amplifier
Roger Neckloop – Gateway
MyRoger Mic App
carrying options
Chest pocket for Roger Covert C
Bag for attachment to various belts.
Item no. PK-104-15
chest straps
Beige chest straps in two sizes, M and L, for wearing the Roger Covert on the body.
Item no. PK-104-16 Size M
Item no. PK-104-17 Size L
Vests for concealed carry
Vests for men and women to wear under clothing with various pockets and loops for storing headsets for concealed wear.
Item no. HS-621-01 Men’s white (S, M, L, XL)
Item no. HS-621-02 Men’s black (S, M, L, XL)
Item no. HS-621-03 Women’s white (8, 10, 12, 14)
Item no. HS-621-04 Women’s black (8, 10, 12, 14)