Listen Technologies LR-42 IR Stethoscope 4-Channel Receiver

LR-42 - Overview

• Features:

  • Secure and reliable infrared audio for applications where isolated signals or security is a matter of importance
  • Stylish, all-in-one stethoscope design makes each unit easy to wear and easy to use
  • Receives up to four (4) channels of crystal-clear audio in either stereo or mono
  • Compatible with standard AAA alkaline or NiMH rechargeable batteries for up to 30 hours of listening
  • Auto shutoff feature extends battery life by powering the receiver off after 30 minutes
  • Comfortable, replaceable ear pieces for easy cleaning and maintenance
   

• Specifications:

  • Audio
  • Frequency Response: 63 Hz - 15 kHz (+/- 3 dB)
  • Signal-to-Noise Ratio: Mono: > 60 dBStereo: > 52 dB
  • System Distortion: < 2% total harmonic distortion (THD)
  • Audio Output Jacks: Built in Stethoscope speakers
  • Audio Output Power: 20 mW maximum at 32 ohms
    
    Controls
  • User Controls: Volume, Power, Channel Select
  • Programming: Channel Lock, Auto Seek, Channel Lock-Out, Squelch
    
    Indicators
  • Unit Power: Indicated by current channel selection LED
  • Channel Selection: Red LED illuminates on the current channel selection
    
    RF
  • Carrier Frequencies: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
  • Number of Channels: Four (4) selectable channels
  • IR Detectors: Two (2) detectors under front IR lens
  • Sensitivity: One (1) nW/cm2 at 40 db SNR
  • Frequency Accuracy: +/- .005% stability 0 to 50C
  • Squelch: Automatic on loss of RF signal (40 dB SNR)
    
    Power
  • Battery Type: Two (2) AAA alkaline batteries or NiMH battery pack
  • Battery Life: 30 hours alkaline, 15 hours NiMH rechargeable pack (LA-364)
  • Battery Charging Time: Fully Automatic with NiMH battery pack and LA-350 charger
    
    Physical
  • Width: 4.00 in. (102 mm)
  • Height: 1.80 in. (46 mm)
  • Depth: .75 in. (19 mm)
  • Length: Stethoscope Arm length 8 in. (203 mm)
  • Color: Dark Grey with White Silk Screening
  • Unit Weight with Batteries: 2.95 oz. (85 g)
  • Shipping Weight: 1.0 lb. (0.5 kg)
  • Weight: 2.15 oz. (60 g)
    
    Environmental
  • Temperature - Operation: 14 °F (-10 °C) to 104 °F (+40 °C)
  • Temperature - Storage: -4 °F (-20 °C) to (122 °F)
  • Relative Humidity: 0 to 95% relative humidity, non-condensing
    
    Compliance
  • Standards: FCC Part 15, Industry Canada, CE, RoHS
   

• Item Includes:

  • One (1) LR-42 IR Stethoscope 4-Channel Receiver
  • One (1) LA-152 IR Receiver Battery Compartment (Non-Charging)
  • One (1) Quick Reference Card
   

• GTIN:

  0819267022232