Battery operated twinkle lights. I add these to all of my garlands. •Dewdrop string lights make a great addition to your seasonal decor •Fitted with 30 white tiny LED bulbs to cast a brilliant festive glow •Twinkling light effect •Requires batteries for operation •Built in timer function - 6 hours on/18 hours off LTKSeasonal LTKHoliday LTKhome