Spectrum Brands SPECTRUM PLUS SP-550 - Manual (Page 66)

Keep the telephone dry. If it gets wet on the outside, wipe it dry
immediately. Liquids might contain minerals that can corrode the
electronic circuits. Do not touch the unit if submerged in water.
Call for assistance.
Use and store the telephone only in normal temperature
environments. Temperature extremes can shorten the life of
electronic devices, damage batteries, and distort or melt plastic
parts. Avoid direct sunlight.
Keep the telephone away from excessive dust and dirt that can
cause premature wear of parts.
Wipe the telephone with a damp cloth occasionally to keep it
looking new. Do not use harsh chemicals, cleaning solvents,
or strong detergents to clean the unit.
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