User manual
Listen Technologies LKS-1 Base 4 System

User Manual for Listen Technologies LKS-1 Base 4 System with 4 Transceivers, 1 Headset and 4-Port USB Charger

• Product category: Wireless Intercoms Listen Technologies
• Brand: Listen Technologies
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for Listen Technologies Wireless Intercoms

Product description

• LK-1 ListenTALK Transceiver with Lanyard, Ear Speaker, and Battery
  • Listen Technologies - ListenTALK Product Video
  • ListenTALK How To - Creating a Group
  • ListenTALK How To - Pairing Via Tray
  • ListenTALK How To: Modes
  • ListenTALK How To - Software Pairing
  • ListenTALK How To - Jack Sense Overview
  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. UPC: 819267021884
• LA-452 On-Ear Headset with Boom Mic (Single-Ear) The Listen Technologies LA-452 is an over-the-head, on-ear headset with a single-eared construction. It’s designed to be used with two-way communications devices such as the ListenTALK LK-1 Transceiver. The over-the-head construction provides both comfort and a secure fit, while its built-in boom mic facilitates hands-free communication. With a unidirectional polar pattern and noise-reduction technology, the on-board microphone offers clear amplification of your voice—and your voice alone. A 3.5mm TRRS connection point is compatible with many two-way systems. Lightweight at 2.2 oz, the LA-452's single-eared construction promotes audio clarity in its signal path without blocking outside sounds, thus allowing you to hear both your surroundings and the headphones. UPC: 123456789098
• 4-Port USB Wall Charger The 4-Port USB Wall Charger from LISTEN Technologies turns your wall outlet into a charging station, keeping your LISTEN iDSP products ready to go. It is a suitable accessory for personal use of iDSP products or for smaller venues. The charger's compact design makes it easy to store and does not block extra outlets on the wall. This charger is compatible with LISTEN iDSP receivers and supports input voltages of 100 to 240 VAC, 50 to 60 Hz. This model features four USB ports, and a small LED on the front of the charger illuminates when the charger is plugged into a live power socket. It comes with four USB-to-micro-USB cables. UPC: 819267021495

• LA-365 Replacement Rechargeable Li-ion Battery

• LA-401 Universal Ear Speaker (Dark Gray)

• Listen Breakaway Lanyard for M1 Interface

• Limited 5-Year Warranty

• Limited 1-Year Warranty

• Limited 90-Day Warranty

• Set of 4 USB-to-Micro-USB Cables

Also Includes

• Limited 5-Year Warranty

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Technical parameters

• LK-1 ListenTALK Transceiver with Lanyard, Ear Speaker, and Battery

  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

  Impedance	16 to 32 Ohms
  Max Output Power	67 mW, 16 Ohm load (threshold of clipping)
  Features	Side-tone adjustable

  Compatibility	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

  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

  Enclosure Material	PC ABS plastic
  Indicators	64 x 128 OLED display, variable brightness Red/white multi-function LED (mute, charge status)
  User Controls	Volume up, volume down, talk, power/status, talk modes, pairing
  Connections	1 x 3.5 mm TRRS headset output, CTIA compliant 1 x micro-USB port for control and charging 1 x 4-contact charger port
  Battery Type	Lithium-ion rechargeable, removable, 1200 mAh 3 x AAA battery compartment (optional)
  Operating Time	Li-ion: 12 hours for participant, 8 hours for leader (typical) AAA: 9 hours for participant, 6 hours for leader (typical)
  Charging Time	2.5 to 3 hours (typical)
  Power Save Mode	Power down on loss of signal Power down on disconnection of headset (1 min) Power down on charging
  Compliance	Pending (FCC part 15, ICS-03, CE, RCM, RoHS, WEEE)
  Temperature	Operational: 14 to 104°F / -10 to 40°C Storage: -4 to 122°F / -20 to 50°C
  Relative Humidity	0 to 95% relative humidity, non-condensing
  Dimensions (H x W x D)	3.9 x 2.1 x 0.9" / 10 x 5.4 x 2.4 cm (with belt clip) 3.9 x 2.1 x 0.6" / 10 x 5.4 x 1.6 cm (without belt clip)

  Box Dimensions (LxWxH)	6.0 x 4.4 x 2.1"

• LA-452 On-Ear Headset with Boom Mic (Single-Ear)

  Construction	Single-eared, on-ear
  Connections	1 x 3.5 mm TRRS, CTIA compliant
  Microphone Element	Electret
  Polar Pattern	Unidirectional, noise-cancelling
  Microphone Impedance	1.5 kOhms, typical
  Sensitivity	-40 dBV / PA at 1 kHz
  Microphone Bias	1.5 to 3 VDC
  Headphone Impedance	140 Ohms
  Frequency Response	200 Hz to 6.8 kHz, headphones 200 Hz to 6.8 kHz, microphone
  Standards	RoHS
  Cable Length	37" / 93 cm
  Weight	2.2 oz / 62.7 g

  Box Dimensions (LxWxH)	6.9 x 1.2 x 1.2"

• 4-Port USB Wall Charger

  Power Input	100 to 240 VAC, 50 to 60 Hz, 0.18 A
  Power Output	5.0 VDC, 4.2 A
  Cable Length	2.44 x 2.90 x 1.13" (62 x 74 x 29 mm) Cable Length: 36" (92 cm)
  Certificates	UL, FCC, RoHS
  Weight	7.80 oz (221 g)

  Box Dimensions (LxWxH)	5.2 x 4.5 x 1.2"

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