Yoland Outdoor String Light, Fairy Copper Wire Decoration Lights Ideal for Seasonal, Home, Garden, Party, Christmas, Indoor Use (2 Set, 10Ft 30LEDs, Blue) Made from high quality copper wire that is thin and flexible, Bendable but Sturdy Wire with LED Lights is Totally Submersible 2 Sets in one package. 30 Bright Warm White LED Lights on 10 Feet Long copper wire; LED Space: 3.93 inches 2 * CR2032 batteries required and included,When used with new batteries it offers approximately 20 Hours Copper wire part is waterproof designs, great for indoor and outdoor use. But noted, please keep the battery part away from water or rain These LED Battery Operated String Lights are perfect for DIY decoration, Christmas, Halloween, Wedding, Party, etc