IP43 Waterproof for Indoor Outdoor Use: All string lights and battery box are IP43 waterproof, can be used on any weathers. A warm and festive Christmas indoor and outdoor decorations, used on the Christmas tree, bedroom, dormitory, bar, window, fence, gallery, terrace, porch or pergola, etc. DIY Xmas Decoration: The Christmas lights can be bent into any shape you like. Decorated on the bedrooms, fences, tables, trees, dormitories, curtains, Christmas, birthday, wedding, holiday, graduation, Valentine's Day, fashion show, etc.The LED string lights is made of silver copper core wire and wrapped by transparent PVC, safe, durable and will not heat. Battery box button: The battery box button control on/off, you need 2 AA battteries(not include).