Listen Technologies Stethoscope-Style IR 4-Channel Receiver

BH #LILR42 • MFR #LR-42
Listen Technologies Stethoscope-Style IR 4-Channel Receiver
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Expected availability: 7-10 business days
$37/mo. suggested payments.*
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Listen Technologies LR-42 Overview

This Stethoscope-Style IR 4-Channel Receiver from LISTEN Technologies can receive up to four channels in mono or stereo. The LR-42 delivers audio specs in a small package and is compatible with other manufacturers' products. It complies with government requirements such as ADA, assistive listening and language interpretation, as well as live theater, houses of worship, courtrooms, secure rooms and auditory description. The unit automatically shuts off after 30 minutes without audio carrier, which extends battery life. It runs on AAA alkaline batteries for more than 30 hours of use, or a NiMH rechargeable battery pack that delivers 15 hours of use per charge.

  • Secure wireless communication, suitable for applications where isolation of the signal is important, or where security is a concern
  • All-in-one unit stetho design; no wires to tangle, easy distribution
  • Receives up to four mono or stereo channels and provides performance with clear sound
  • Uses standard AAA batteries or rechargeable Listen NiMH battery pack, giving you flexibility in managing battery life
  • Auto shut-off feature (after 30 minutes of no carrier) saves battery life
  • Ear tips can be easily cleaned or replaced

Listen Technologies LR-42 Specs

System Distortion<2% total harmonic distortion (THD)
OutputBuilt in Stethoscope speakers
Frequency Response63 Hz to 15 kHz (+/- 3 dB)
Signal to Noise Ratio (SNR)Mono: >60 dB
Stereo: >52 dB
ControlsUser Controls: volume, power, channel select
Programming: channel lock, auto seek, channel lock-out, squelch
IndicatorsUnit Power: indicated by current channel selection LED Channel Selection: red LED illuminates on the current channel selection
RF Dongle
Carrier Frequency2.3, 2.8, 3.3 and 3.8 MHz
Number of Channels4 x selectable channels
IR Detector2 x detectors under front IR lens
Sensitivity1 x nW/cm2 at 40 db SNR
Frequency Accuracy+/- 0.005% stability 0 to 50 C
SquelchAutomatic on loss of RF signal (40 db SNR)
Battery Type2 x AAA alkaline batteries or one NiMH battery pack
Battery Life30 hours for alkaline batteries
15 hours NiMH rechargeable pack (LA-364)
ChargingFully automatic with NiMH battery pack and LA-350 charger
ColorDark grey with white silk screening
EnvironmentalOperation Temperature: 14 to 104°F (-10 to 40°C)
Storage Temperature: -4 to 122°F (-20 to 50°C )
Relative Humidity: 0 to 95% relative humidity, non-condensing
Dimensions1.8 x 4 x 0.75" / 46 x 102 x 19 mm
Weight2.15 oz. (60 g)
Packaging Info
Package Weight0.3 lb
Box Dimensions (LxWxH)9.4 x 6.2 x 1.7"
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