Britton Flag Ampetronic Audio Solutions for the UK

Z-LK-1 ListenTalk Transceiver

  • Simple and flexible communication at the touch of a button
  • Secure conversations through proprietary encryption technology
  • Reliable and dependable duplex operation

One-to-many communication systems are useful in a wide range of circumstances from tour guides in a museum, teaching a group of students in a lecture theatre, to event team management coordination.

Ampetronic™ ListenTALK is a powerful duplex solution for all group communication needs and tour guide applications. Due to its ability to operate in multiple modes and in different configurations it is also highly effective for translation and assistive listening.

ListenTALK offers

- flexible configuration for multi-purpose applications
- simple push button operation
- proprietary encryption for secure communications
- reliable duplex system working with low interference in the rarely used 1.9 GHz DECT band
- multi-group function with up to 15 simultaneous two-way groups - ideal for tour guides
- simple single interface, any unit can be set up to be leader or participant
- create groups easily with near field communication (NFC) or a single button press
- two way communication via a built in microphone on each unit, allows participants to ask questions of the leader
- robust design for prolonged use

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  • Fast and simple two-way communication
  • Push-to-talk functionality
  • Exclusive encryption technology for added security
  • Compatible with standard earbuds and Listen Technologies headsets
  • Long-lasting lithium ion rechargeable batteries
  • Optional Alkaline Battery Compartment


  • Assistive listening
  • Translation and interpretation
  • Team communication
  • Tour guide
  • Conferencing and presentations

Standards Compliance

FCC part 15, ICS-03, CE, RCM, RoHS, WEEE



Dimensions (H x W x D) with Belt Clip10 x 5.4 x 2.4 cm (3.93 x 2.13 W x 0.93 in.)
Unit Dimensions (H x W x D)10 x 5.4 x 1.6 cm (3.93 x 2.13 W x 0.63 in.)
Unit Weight79 g (2.79 oz.)
Shipping Weight206 g (7.20 oz) with 454 g (1.0 lbs.) minimum
Enclosure materialPC ABS Plastic
ColorBlack, Chrome Buttons
IndicatorsDisplay- 64 x 128 OLED, Variable brightness
LED- RED/White multifunction (Mute, Charge Status)
User ControlsVolume up, Volume Down, Talk, Power/Status, Talk Modes, Pairing
ProgrammingVia software and USB port on unit or via software and USB port on Docking Station
ConnectionsHeadset- 3.5mm TRRS, CTIA complaint
USB- Micro USB, Control and Charging
Charger- 4 Contact, Control and Charging


Headphone OutputSpeaker Load- 16 - 32 ohm load
Max Output Power- 67 mW, 16 ohm load, Threshold of Clipping
Side Tone- Adjustable
Microphone InputCompatibility- Electret, external bias
Bias- 3 volt, 2 mA Current Maximum
Sensitivity Requirement -28 to - 50 dBV/Pa
Internal MicrophoneSwitching- Auto detect on jack insertion or Manual
Maximum Input Level- 109 DBSPL
Gain- Adjustable, 30 dB range
SystemFrequency Response- 40 Hz to 15 kHz +/- 3dB, 22kHz low pass filter
SNR- 70 dB, A- weighted, Threshold of Clipping
THD- 0.5% @ 1kHz, 22kHz low pass enabled


Operating Frequency1920 to 1930 MHz - North America
1880 to 1900 MHz - Europe, Australia
Average Power4 mW - North America
10 mW - Europe, Australia
Typical RangeIndoor 100 m, Outdoor 200 m, depending upon conditions - North America
Indoor 150 m, Outdoor 300 m, depending upon conditions - Europe, Australia
ModulationGFSK - FHSS
SecuritySubscription- 40 bit (Pin Free)
Authentication- 32 bit
Encryption- 64 bit
NFC Frequency (Near Field Communications)13.56 MHz

Power and Battery Management

Battery TypeLithium – ion, rechargeable non-proprietary removable, 1200 mAh
Optional- 3 AAA Battery Compartment
Typical Operating TimeLi-ion- Participant- 12 Hours
AAA – Participant Mode – 7 Hours
Li-ion – Leader Mode – 7 hours
AAA – Leader Mode – 4 hours
Typical Charge time4 Hours
Power Save ModesPower down on loss of signal
Power down on disconnection of headset (1 min)
Power down on charging


TemperatureOperation- -10 °C (14 °F) to 40 °C (+104 °F)
Storage- -20 °C (-4 °F) to 50 °C (+122 °F)
Relative Humidity0 to 95% relative humidity, non-condensing


Ampetronic are pleased to announce that we will be offering the award winning new WiFi Audio streaming system.
The class leading performance of the new iDSP Infrared System really is the sum of its outstanding parts!
Assistive Listening Systems are a special type of sound system designed specifically to help people with hearing loss access audio services in public places by connecting them directly.
Ampetronic are world leaders in the design and manufacture of assistive listening systems and audio solutions.