Listen Technologies LKS-4-A1 ListenTALK Portable ADA Kit, Includes 4x LK-1 Transceivers, LA-451 Headset 1

SKU: LTLKS4A1 MFR: LKS-4-A1
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Key Features

  • Ensure clear communication with this ListenTALK ADA kit, perfect for assistive listening.
  • Experience superior sound quality with the LA-451 headset, designed for optimal clarity.
  • Enjoy hands-free convenience with breakaway lanyards, keeping your ListenTALK secure.
  • Use the universal ear speakers (LA-401) for comfortable, discreet audio during discussions.
  • Stay connected with reliable Listen Technologies transceivers for seamless group communication.
  • Charge easily with the 4-port USB charger, ensuring your ListenTALK system is always ready.
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Special Order?Estimated to Ship: 09/10/2025
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Listen Technologies LKS-4-A1 Specifications

Transceiver: Audio

Transceiver: Audio

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  • 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

Transceiver: Radio

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  • 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
    TDD/TDMA/DCA

  • Security

    Subscription- 40 bit (Pin Free)
    Authentication- 32 bit
    Encryption- 64 bit

  • NFC Frequency

    13.56 MHz (Near Field Communications)

Transceiver: Power & Battery Management

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  • 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

Transceiver: Environmental

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  • Temperature

    Operation: 14 to +104 Degree F (-10 to 40 Degree C)
    Storage: -4 to +122 Degree F (-20 to 50 Degree C)

  • Relative Humidity

    0 to 95% relative humidity, non-condensing

Transceiver: Compliance

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  • Standards

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

Transceiver: Physical

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  • 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

  • Dimensions (H x W x D)

    with Belt Clip: 3.93 x 2.13 x 0.93" (10 x 5.4 x 2.4cm)
    3.93 x 2.13 x 0.63" (10 x 5.4 x 1.6cm)

  • Weight

    2.79 oz (79 g)

Headset 1: Audio

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  • Microphone Element

    Electret

  • Microphone Polar Pattern

    Omnidirectional

  • Microphone Impedance

    2.2 kOhms typical

  • Microphone Sensitivity

    -40 dBV/Pa @ 1 kHz

  • Microphone Bandwidth

    100 Hz - 10 kHz

  • Microphone Bias

    1 - 10 VDC

  • Headphone Impedance

    32 Ohms

  • Headphone Bandwidth

    300 Hz - 10 kHz

Headset 1: Compliance

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  • Standards

    RoHS

Headset 1: Physical

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  • Color

    Black

  • Cable Length

    41" (104cm)

  • Weight

    0.93 oz (27g)

  • UPC Code

    819267025295

About Listen Technologies LKS-4-A1

Take your assistive listening capabilities to the next level with the LKS-4-A1 ListenTALK Portable ADA Kit, a comprehensive and user-friendly solution designed to meet the needs of individuals with hearing impairments in various environments. This innovative system complies with all IBC and ADA requirements for spaces accommodating up to 75 individuals, ensuring inclusivity and accessibility in listening centers, classrooms, conferences, boardrooms, and houses of worship.

The LKS-4-A1 kit features four LK-1 Transceivers, which are the epitome of high-quality two-way mobile communications. These transceivers are engineered with Listen Technologies' exclusive encryption technology, offering secure, interference-free full duplex communication on the 1.9 GHz unlicensed PCS band. The Frequency-Hopping Spread Spectrum (FHSS) techniques employed by these devices guarantee a crystal-clear connection without the risk of eavesdropping or interference.

Pairing and group formation are made effortless with Near-field communication (NFC), a Docking Station, or Software Suite, allowing for up to 10 simultaneous groups to operate in proximity without conflict. The transceivers are intuitively designed with simple controls for power, talk, and volume adjustments, and feature a 3.5 mm TRRS CTIA compliant headset connection compatible with standard electret style headsets.

The LK-1 Transceiver boasts a durable and portable design, with a leader clip that automatically designates the unit as a leader when inserted, granting the presenter control over pairing, group creation, and talkback modes. The built-in microphone with auto-detect circuitry accommodates personal earbuds, while the 64 x 128 OLED display with auto-dimming showcases all vital information, including group name, volume levels, and battery status.

For extended use, the devices are powered by a removable, rechargeable lithium-ion battery, with an optional compartment for 3 AAA alkaline batteries. Automatic battery charging circuitry ensures your transceivers are always ready for action, whether charged via micro USB port or docking station.

Included in the kit is the LA-451 Headset 1, which pairs perfectly with the LK-1 Transceiver for a seamless two-way communication experience. The headset features a single-earpiece design for exceptional audio clarity, allowing users to stay connected to their surroundings. The built-in boom mic adds convenience for clear conversations, and the lightweight, compact design ensures comfort during extended use.

Durable, high-quality, and portable, the LKS-4-A1 ListenTALK Portable ADA Kit from Listen Technologies is the ideal choice for providing superior assistive listening support in any setting. This innovative and user-friendly system is ready to deliver on-demand assistive listening with minimal setup time, ensuring that every participant can engage fully in the auditory experience.

Listen Technologies LKS-4-A1 Features

  • Takes less than a minute to set up and use
  • Simple user interface (no channel surfing)
  • Easily portable in small, compact case

Product Documents

User Manual

Key Features

  • Ensure clear communication with this ListenTALK ADA kit, perfect for assistive listening.
  • Experience superior sound quality with the LA-451 headset, designed for optimal clarity.
  • Enjoy hands-free convenience with breakaway lanyards, keeping your ListenTALK secure.
  • Use the universal ear speakers (LA-401) for comfortable, discreet audio during discussions.
  • Stay connected with reliable Listen Technologies transceivers for seamless group communication.
  • Charge easily with the 4-port USB charger, ensuring your ListenTALK system is always ready.

What's in the box:

  • 4x LK-1 ListenTALK Transceivers
  • LA-451 Headset 1 (Ear Speaker with Boom Mic)
  • 3x LA-401 Universal Ear Speaker
  • 4x LA-445-BK Breakaway Lanyard
  • 2x LA-166 Neck Loop
  • LA-423-01 4-Port USB Charger
  • LA-436 Microphone Input/Headphone Output Cable
  • LA-483 Soft Shell Case 4
  • Listen Technologies Lifetime Limited Warranty