$372.00 MSRP
$297.60 B-STOCK

This product is available through authorized resellers.

Request Quote

Designed to be the new standard for two-way mobile communications, the ListenTALK Transceiver is the smartest system available. The all-in-one device, equipped with Listen Technologies’ exclusive encryption technology and push-to-talk functionality, provides the simplest option for communication and collaboration among two or more people in any environment. In addition to the included Listen Ear Speaker, ListenTALK can be used with standard smartphone earbuds or a Listen Technologies headset.


One (1) LK-1 ListenTALK Transceiver w/Leader Clip
One (1) LA-365 Rechargeable Li-ion Battery
One (1) LA-401 Universal Ear Speaker
One (1) LA-445-BK Breakaway Lanyard


  • 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
Configurations & Architectural Specs


LK-1-A0 ListenTALK Transceiver (North America)
LK-1-E0 ListenTALK Transceiver (Europe EU28, Australia)

Architectural Specs

The transceiver shall be a digital transceiver operating on the 1.9 GHz unlicensed PCS band utilizing Frequency-Hopping Spread Spectrum (FHSS) techniques allowing interference free full duplex communication. The device shall employ a multiply layer security protocol consisting of a 40-bit (pin free) group subscription, 32-bit authentication and a 64-bit encryption scheme enabling secure conversations. It shall be easy to pair and form groups via Near-field communication (NFC), Docking Station or Software Suite. It shall be simple to operate with a Power, Talk and Volume Up and Down buttons. It shall allow up to 10 simultaneous groups to operate in the same area. It shall be powered via a removable non-proprietary rechargeable lithium-ion battery or via an optional 3 AAA alkaline battery compartment.

The transceiver shall have a 3.5 mm TRRS CTIA compliant headset connection allowing operation with a standard electret style headset. It shall have a built-in-microphone with auto detect circuitry if users elect to use their personal ear buds. It shall have a 64 x 128 OLED display with auto diming allowing display of all current status (group name, volume levels, mute, battery status, time remaining, signal strength, unit ID, mode, etc.) The device shall have a leader clip and when inserted the unit automatically designates itself as a leader and allows the leader/presenter to control pairing/group creation and leader talkback modes (listen only, leader only or group).

The transceiver shall have a signal-to-noise ratio of 70 dB or greater and shall have an audio frequency response of 40 Hz – 15 kHz (±3 dB). The device shall incorporate automatic battery charging circuitry to charge and maintain the lithium-Ion battery either via the micro USB port or via the docking station using the additional charging contacts on the bottom of the device.

The ListenTALK LK-1 is specified.

Product Specifications
Specification LK-1-A0b


Dimensions (H x W x D) with Belt Clip 10 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 Weight 79 g (2.79 oz.)
Shipping Weight 206 g (7.20 oz) with 454 g (1.0 lbs.) minimum
Enclosure material PC ABS Plastic
Color Black, Chrome Buttons
Indicators Display- 64 x 128 OLED, Variable brightness
LED- RED/White multifunction (Mute, Charge Status)
User Controls Volume up, Volume Down, Talk, Power/Status, Talk Modes, Pairing
Programming Via software and USB port on unit or via software and USB port on Docking Station
Connections Headset- 3.5mm TRRS, CTIA complaint
USB- Micro USB, Control and Charging
Charger- 4 Contact, Control and Charging


Headphone Output Speaker Load- 16 - 32 ohm load
Max Output Power- 67 mW, 16 ohm load, Threshold of Clipping
Side Tone- Adjustable
Microphone Input Compatibility- Electret, external bias
Bias- 3 volt, 2 mA Current Maximum
Sensitivity Requirement -28 to - 50 dBV/Pa
Internal Microphone Switching- Auto detect on jack insertion or Manual
Maximum Input Level- 109 DBSPL
Gain- Adjustable, 30 dB range
System Frequency 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 Frequency 1920 to 1930 MHz - North America
1880 to 1900 MHz - Europe, Australia
Average Power 4 mW - North America
10 mW - Europe, Australia
Typical Range Indoor 100 m, Outdoor 200 m, depending upon conditions - North America
Indoor 150 m, Outdoor 300 m, depending upon conditions - Europe, Australia
Modulation GFSK - FHSS
Security Subscription- 40 bit (Pin Free)
Authentication- 32 bit
Encryption- 64 bit
NFC Frequency (Near Field Communications) 13.56 MHz

Power and Battery Management

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


Temperature Operation- -10 °C (14 °F) to 40 °C (+104 °F)
Storage- -20 °C (-4 °F) to 50 °C (+122 °F)
Relative Humidity 0 to 95% relative humidity, non-condensing


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

* Specifications subject to change without notice.
Used With
Q How many channels are available with ListenTALK?
A ListenTALK uses 1.9GHz spread spectrum. It does not use “channels” because it is constantly changing frequencies.
Q How many participants can be in each ListenTALK tour group?
A In a ListenTALK tour group there can be an unlimited number of participants.
Q How many groups in the same room can ListenTALK support?
A ListenTALK's current specification is that you can have 10 simultaneous groups operating in the same room.
Q How many simultaneous groups will ListenTALK support?
A ListenTALK supports up to 10 simultaneous groups within each service area. North America service area: 100 m indoor, 200 m outdoor, depending on conditions Europe service area: 150 m indoor, 300 m outdoor, depending of conditions
Q ListenTALK can have up to 10 groups in "one area". What does "one area" consist of?
A One area consists of the typical range, which is 100 m indoors and 200 m outdoors depending on conditions (North America) and 150 m indoors and 300 m outdoors depending on conditions. (Europe version)
Q Will iOS headsets work with ListenTALK?
A Yes, all iOS headsets will function correctly with the ListenTALK Transceiver (LK-1)
Q Will Android headsets work with ListenTALK?
A Android version headsets (roughly 2014 and newer) will function correctly. The older versions have a different microphone/ground configuration making them incompatible with the ListenTALK Transceiver (LK-1).
Systems Included In
Copyright © 1998 - 2021 Listen Technologies Corporation. All rights reserved.
Listen, ListenPoint and related marks and logos are registered trademarks of Listen Technologies Corporation. Terms of Use | Privacy Policy
Listen Technologies