CM-Light 2M 20LED Battery Operated Multi-Color LED Starry String Fairy Lights For Wedding Birthday Party New Year Festival Decoration Safe,power-saving,Eco-friendly,Flexible and Easy to Use. 3 x AA batteries required (not included),super long working time. Two modes which you can choose with a switch:steady and flashing Waterproof!Suitable for Indoor and Outdoor in all weather and all seasons. Perfect for decorating your Christmas trees, parties, weddings and other celebrations.