The Listen Technologies LK-1 is a transceiver designed for two-way mobile communications. It utilizes Listen Technologies’ proprietary encryption technology to ensure security, and provides easy-to-use, push-to-talk implementation in the field for simple coordination and communication among two or more collaborators in any scenario.
User controls such as volume up, volume down, talk, power/status, and pairing help you in tailoring the unit to your particular, moment-to-moment needs. Though the unit can be used with a Listen Technologies headset—or standard smartphone earbuds—the LK-1 comes with an LA-401 Universal Ear Speaker, as well as a lanyard (useful for on-the-go scenarios), and an LA-365 rechargeable lithium-ion battery. The LK-1 is fully compliant with ADA standards for assistive listening.
Operating Frequency 1920 to 1930 MHz Power 4 mW, average Typical Range Indoor: 328' / 100 m, depending upon condition Outdoor: 656' / 200 m, depending upon conditions Modulation GFSK - FHSS, TDD/TDMA/DCA Security Subscription: 40-bit (pin free) Authentication: 32-bit Encryption: 64-bit
Headphone Output Impedance 16 to 32 Ohms Max Output Power 67 mW, 16 Ohm load (threshold of clipping) Features Side-tone adjustable
Electret, external bias
Power 3 V, 2 mA current maximum
Sensitivity -28 to -50 dBV/Pa
Internal Microphone Switching: Auto detect on jack insertion or manual Maximum Input Level: 109 dB SPL Gain: Adjustable with 30 dB range
System Frequency Response 40 Hz to 15 kHz, ±3 dB, 22 kHz low-pass filter Signal to Noise Ratio 70 dB, A-weighted (threshold of clipping) Total Harmonic Distortion 0.5% at 1 kHz, 22 kHz low-pass enabled Programming Via software and USB port on unit or via software and USB port on docking station
Listen Technologies LK-1 ListenTALK Transceiver with Lanyard, Ear Speaker, and Battery