Overview
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.
Includes
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
Features
- 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
ConfigurationsLK-1-A0 ListenTALK Transceiver (North America)
LK-1-E0 ListenTALK Transceiver (Europe EU28, Australia)
Architectural SpecsThe 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.
Specifications
| Specification | LK-1 |
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Physical |
| 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 |
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Audio |
| 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 |
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Radio |
| 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 (Near Field Communications) | 13.56 MHz |
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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 |
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Environmental |
| 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 |
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Compliance |
| Standards | FCC part 15, ICS-03, CE, RCM, RoHS, WEEE |
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| * Specifications subject to change without notice. |
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