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The LKR-12 ListenTALK Receiver Basic is a one-way device designed for those participants that only need to listen to ListenTALK group conversations. The LKR-12 is equipped with Listen Technologies’ ergonomic design, encryption technology for added security, and easy to use volume control. ListenTALK Receiver Basic is the simplest option for one-way communication among groups of two or more people in any environment. In addition to the included Listen Ear Speaker, ListenTALK can be used with standard smartphone earbuds or Listen Technologies headphones.


One (1) LKR-12 ListenTALK Receiver Basic
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 one-way communications
  • Simple up and down volume control
  • Encryption technology for added security
  • Compatible with standard earbuds and Listen Technologies headphones
  • Long-lasting lithium-ion rechargeable batteries
  • Optional Alkaline Battery Compartment
Configurations & Architectural Specs


LKR-12-A0 ListenTALK Receiver Basic (North America)
LKR-12-E0 ListenTALK Receiver Basic (Europe EU28, Australia)
LKR-12-J0 ListenTALK Receiver Basic (Japan)

Architectural Specs

The receiver shall be a digital receiver operating on the 1.9 GHz unlicensed PCS band utilizing Frequency-Hopping Spread Spectrum (FHSS) techniques allowing interference free one-way 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 Docking Station or Software Suite. It shall be simple to operate with a Power 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 receiver shall have a 3.5 mm TRRS CTIA compliant headphone connection allowing operation with a standard style headphones. It shall have a multifunction Green/White LED allowing On/Off, Charging and Battery status.  The receiver 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 LKR-12 is specified.

Product Specifications
Specification LKR-12


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 Variable brightness LED- Green/White multifuntion (On, Charge Status, Battery Status)
User Controls Volume up, Volume down, Power/Status
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
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
1895 to 1905 MHz - Japan
Typical Range Indoor 100 m, Outdoor 200 m, depending upon conditions - North America, Japan
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

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
Typical Charge time 4 Hours
Power Save Modes Power down on loss of signal
Power down on disconnection of headphone (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, MIC, RoHS, WEEE

* Specifications subject to change without notice.
Used With
Q What is the range of ListenTALK units?
A ListenTALK (North America Mode) units have a range of up to 200 m depending upon conditions, (Europe/Australia Mode) units have a range of up to 300 m depending upon conditions. These are "line of sight" specifications.
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)
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