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User Manual for Listen Technologies Stethoscope-Style IR 4-Channel Receiver Click to enlarge the picture
Contents of the user manual for the Listen Technologies Stethoscope-Style IR 4-Channel Receiver
- Product category: Components & Accessories 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 Components & Accessories
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User manual for the Listen Technologies Stethoscope-Style IR 4-Channel Receiver contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Listen Technologies product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Listen Technologies user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Listen Technologies product will considerably shorten its lifespan!
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Product description 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
In the Box Listen Technologies Stethoscope-Style IR 4-Channel Receiver LA-152 IR Alkaline Battery Compartment (Non-Charging) Quick Reference Card Limited Lifetime Warranty Table of Contents
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Technical parametersListen Technologies LR-42 Specs | | | System Distortion | <2% total harmonic distortion (THD) | | Output | Built in Stethoscope speakers | | Frequency Response | 63 Hz to 15 kHz (+/- 3 dB) | | Signal to Noise Ratio (SNR) | Mono: >60 dB
Stereo: >52 dB | | 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 | | | | Carrier Frequency | 2.3, 2.8, 3.3 and 3.8 MHz | | Number of Channels | 4 x selectable channels | | IR Detector | 2 x detectors under front IR lens | | Sensitivity | 1 x nW/cm2 at 40 db SNR | | Frequency Accuracy | +/- 0.005% stability 0 to 50 C | | Squelch | Automatic on loss of RF signal (40 db SNR) | | | | Battery Type | 2 x AAA alkaline batteries or one NiMH battery pack | | Battery Life | 30 hours for alkaline batteries
15 hours NiMH rechargeable pack (LA-364) | | Charging | Fully automatic with NiMH battery pack and LA-350 charger | | | | Color | Dark grey with white silk screening | | Environmental | Operation 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
| | Dimensions | 1.8 x 4 x 0.75" / 46 x 102 x 19 mm | | Weight | 2.15 oz. (60 g) | | | | Package Weight | 0.3 lb | | Box Dimensions (LxWxH) | 9.4 x 6.2 x 1.7" |
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