Listen Technologies ListenTALK BASE-4 system

General Description

The ListenTALK BASE-4 system enables one leader and three additional team members to easily communicate with each other. This wireless package comprises four transceivers, a 4-port USB plug top charger, headset with adjustable boom microphone for the group leader, and single ear speakers for the rest of the group.

The two-way ListenTALK BASE-4 system is ideal for a group leader to communicate with team members. A team member can speak back to the leader and the rest of the group, when the leader permits.

This portable system has no base station so can be used indoors or outdoors.

Each transceiver has an OLED screen to display the group name, battery status, etc.

Features

Complete package ready to use
Wireless two-way communication
Leader can maintain control with priority
Encryption for confidential meetings
Licence-free anywhere in Europe
Lightweight and easy to use
Programmable via ListenTALK Software Suite

Delivery Includes

LKS-1 system comprising-
4 LK-1 Transceiver with Leader Clip
4 LA-401 Universal Ear Speaker
4 LPT-A207 Breakaway Lanyard
1 LA-452 Headset 2
1 LA-423 4-Port USB Charger

Technical Data

LK-1 Transceiver
Physical
Dimensions (H x W x D) with Belt Clip: 10 x 5.4 x 2.4 cm
Unit Dimensions (H x W x D): 10 x 5.4 x 1.6 cm
Unit Weight: 79 g
Enclosure material: PC ABS Plastic
Colour: 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

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

Radio
Operating Frequency: 1880 to 1900 MHz
Average Power: 10 mW
Typical Range: Indoor 150 m, Outdoor 300 m, depending upon conditions
Modulation: GFSK - FHSS, TDD/TDMA/DCA
Security: Subscription- 40 bit (Pin Free), Authentication- 32 bit, Encryption- 64 bit

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 – 9 Hours, LI-ion – Leader Mode – 8 hours, AAA – Leader Mode – 6 hours
Typical Charge time: 2.5 - 3 Hours
Power Save Modes: Power down on loss of signal, power down on disconnection of headset (1 min), power down on charging

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

Compliance
Standards: Pending (FCC part 15, ICS-03, CE, RCM, RoHS, WEEE)