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
Features
- 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
ConfigurationsLKR-11-A0 ListenTALK Receiver Pro (North America)
LKR-11-E0 ListenTALK Receiver Pro (Europe EU28, Australia)
Architectural SpecsThe 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.
Specifications
| Specification | LKR-11 |
|---|
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, 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 |
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Audio |
| 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 |
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Radio |
| Operating Frequency | 1920 to 1930 MHz - North America | | 1880 to 1900 MHz - 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 - 12 Hours | | AAA – 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 |
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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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