RCA 29578 - Manual (Page 7)

Introduction
CAUTION: When using telephone equipment,
there are basic safety instructions that
should always be followed. Refer to the
IMPORTANT SAFETY INSTRUCTIONS provided
with this product and save them for future
reference.
This phone is designed for those individuals with mild to
severe hearing loss. The unit is designed to control the
volume of the phone as well as the frequencies that best fit
your hearing. It has three pitch control buttons allowing you
to customize the phone to your preference. The equalizer is
set at 600Hz, 1.2KHz and 2.4kHz.
The phone is designed with unique features to protect the
hearing in your family. You will be able to switch between
automatic and manual amplification modes to protect your
hearing from being exposed to dangerous sound levels.
Please read this manual very carefully before using your
958 and keep it for future reference. If you have any
questions or problems, consult the Troubleshooting Tips for
the solution.