These spectacular mini LED lights add an ambiance to your home decor that is mysterious and unique. The near invisible cord makes it seem as though this string of lights is floating through the air like fireflies. Add these lights to any room all year long for that magical feel. 5 hour timer function: When in timer mode, the light string powers on at the time of your choosing for 5 hours, and shuts off for 19 hours. Takes 2 AA batteries (not included).