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by Clarity
- Compatible with home and most business phones (does not attach to Princess, Trimline, or cordless phones)
- Volume adjustable up to 30 dB
- Separate tone control improves the clarity of the incoming voice
- Pushing the Boost button reduces background noise and provides an additional 10 decibels of amplification
- Runs on 9 volt battery (included)
- One year warranty
- For more information, click here to read the User Manual (PDF format)
Set-Up Tip:
- If the phone has a volume control, make sure it is turned all the way down or off
Troubleshooting Tips:
- A constant squealing sound is a sign that the HA-40 is not compatible with the phone. Make sure any volume control on the phone is turned down. If the squealing continues, return the HA-40.
- If other people can't hear the outgoing voice, this is a sign that the HA-40 is not compatible with the phone. Return the HA-40.
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