Sylvania STC595 Owner's Manual page 39

IMPORTANT
In order to get maximum life from the HANDSET
BATTERY PACK, be sure to charge the HANDSET
for 12 hours before initial use.
IMPORTANT
Placing your BASE UNIT near appliances such as
televisions, refrigerators, radios, or microwave
ovens may cause interference.
IMPORTANT
The AC ADAPTOR must always be plugged
into an electrical outlet.
IMPORTANT
In order to utilize the Caller ID feature, you
must subscribe to Caller ID service from
your local telephone company.
IMPORTANT
If you live in an area which receives frequent
thunderstorms, we strongly recommend plugging
your AC ADAPTOR into a surge protector.