Products
LR-42 Stethoscope 4-Channel IR Receiver
LR-42
FAQs

How many receivers can be used in a system?
Infinite number - there is no limit.

How do you replace the batteries in the receiver?
For non-rechargeable batteries (AAA alkaline), remove the battery compartment and replace the batteries with fresh AAA alkaline batteries. For rechargeable NiMH batteries, simply replace the sealed battery pack with a freshly charged pack.

How do I recharge the NiMH batteries?
Use the Listen LA-350 8-Unit Charging/Storage unit. This charging unit will charge batteries that are in the receivers, or batteries that are in our NiMH Rechargeable Battery Pack.

How does the receiver know if the signal is mono or stereo?
It automatically detects the type of signal and responds accordingly.

My stereo signals are a bit noisy. How can I resolve this problem?
Add more radiators. When you are transmitting stereo signals, the signal is degraded slightly. Increasing your radiator coverage will help mitigate this.

What happens when there is no signal from the radiators?
The receiver’s audio signal is muted and after 20 minutes and the unit automatically shuts down to conserve battery life.

How does the user select carriers?
By pressing the SELECT button on the front of the receiver.

Can the receiver automatically find a carrier?
Yes, it will automatically seek and find all available carriers when the power is turned on. If no carrier is found, the unit will stop on the last used channel.

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