Panasonic RR-US490 Operating Instructions Manual page 37

Sound can be deceiving. Over time your hearing "comfort level" adapts to higher volumes of sound. So
what sounds "normal" can actually be loud and harmful to your hearing.
Guard against this by setting your equipment at a safe level BEFORE your hearing adapts.
To establish a safe level:
• Start your volume control at a low setting.
• Slowly increase the sound until you can hear it comfortably and clearly, and without distortion.
Once you have established a comfortable sound level:
• Leave it there.
This product may receive radio interference caused by mobile telephones or other products during
operation. If such interference is apparent, please increase separation between the product and the
mobile telephone or other product.
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