3
Important Note: Cordless phones
such as this one require AC power to
operate. When the AC power is off,
you cannot dial out or receive incoming
calls using your ET-557. To be safe,
you should also have a phone that
does not need AC power to operate
(not a cordless phone) so you can still
make and receive calls if there is an
AC power failure.
For your records, we urge you to
record the serial number of your phone
in the space below. The serial number
is located on the bottom panel of the
base.
Serial Number: __________________
Warning: To prevent fire or shock haz-
ard, do not expose this product to rain
or moisture.
This symbol is intended to alert you
to the presence of uninsulated dan-
gerous voltage within the product’s
enclosure that might be of sufficient
magnitude to constitute a risk of
electric shock. Do not open the
product’s case.
This symbol is intended to inform
you that important operating and
maintenance instructions are in-
cluded in the literature accompany-
ing this product.
RISK OF ELECTRIC SHOCK.
DO NOT OPEN.
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER-SERVICE-
ABLE PARTS INSIDE. REFER SERVIC-
ING TO QUALIFIED PERSONNEL.
CAUTION
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