Samsung M520 Owner's Manual page 54

UL Certified Phone Charger
The phone charger for this phone has met UL 1310 safety requirements.
Please adhere to the following safety instructions per UL guidelines.
FAILURE TO FOLLOW THE INSTRUCTIONS OUTLINED MAY LEAD TO
SERIOUS PERSONAL INJURY AND POSSIBLE PROPERTY DAMAGE.
IMPORTANT SAFETY INSTRUCTIONS - SAVE THESE INSTRUCTIONS.
DANGER - TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
CAREFULLY FOLLOW THESE INSTRUCTIONS. FOR CONNECTION TO A
SUPPLY NOT IN THE U.S.A., USE AN ATTACHMENT PLUG ADAPTOR OF THE
PROPER CONFIGURATION FOR THE POWER OUTLET. THIS POWER UNIT IS
INTENDED TO BE CORRECTLY ORIENTED IN A VERTICAL OR HORIZONTAL
OR FLOOR MOUNT POSITION.
28 Section 2A: Phone Basics