UL Certified Led Christmas Lights: Strictly tested and meets the US requirements of string lights UL safety standards to ensure & maximize the safety. 30V low output voltage make it safe enough for use. 400 LEDs 32ft hanging fairy Christmas lights with 75 Drops, perfect outdoor indoor decorations for Christmas, Thanksgiving, Easter, Halloween, Party, yard, balcony, garden, pergola, gazebo. 8 Lighting Modes with Memory Functions: These outdoor christmas lights with 8 different lighting modes, different lighting effects are controlled by the button on the plug, intelligent memory function design make the string lights will recover from the previous setting mode when you restart the string lights next time.