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Overview

The LKR-11 ListenTALK Receiver Pro is a one-way device designed for those participants that only need to listen to ListenTALK group conversations.  The LKR -11 is equipped with Listen Technologies’ ergonomic design, near field communications, encryption technology for added security, easy to use volume control and quick visible status via the OLED display.  ListenTALK Receiver Pro 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.

Includes

One (1) LKR-11 ListenTALK Receiver Pro
One (1) LA-365 Rechargeable Li-ion Battery
One (1) LA-401 Universal Ear Speaker
One (1) LA-445-BK Breakaway Lanyard

Highlights

  • Fast and simple one-way communication
  • 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

Configurations

LKR-11-A0 ListenTALK Receiver Pro (North America)
LKR-11-E0 ListenTALK Receiver Pro (Europe EU28, Australia)
LKR-11-J0 ListenTALK Receiver Pro (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 Near-field communication (NFC), 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 64 x 128 OLED display with auto diming allowing display of all current status (group name, volume levels, battery status, time remaining, signal strength, unit ID, etc.)

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-11 is specified.

Product Specifications
SpecificationLKR-11

Physical

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, Power/Status
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

Audio

Headphone OutputSpeaker Load- 16 - 32 ohm load
Max Output Power- 67 mW, 16 ohm load, Threshold of Clipping
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

Radio

Operating Frequency1920 to 1930 MHz - North America
1880 to 1900 MHz - Europe, Australia
1895 to 1905 MHz - Japan
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
TDD/TDMA/DCA
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 - 12 Hours
AAA – 7 Hours
Typical Charge time4 Hours
Power Save ModesPower down on loss of signal
Power down on disconnection of headphone (1 min)
Power down on charging

Environmental

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

Compliance

StandardsFCC part 15, ICS-03, CE, RCM, MIC, RoHS, WEEE

* Specifications subject to change without notice.
Requirements
Used With
Accessories
FAQ
QWhat is the range of ListenTALK units?
AListenTALK (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.
QListenTALK can have up to 10 groups in "one area". What does "one area" consist of?
AOne 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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