This LED string light is not only perfect for decorating your home during the Christmas season, but it also provides a cozy lighting solution for living rooms, staircases, gardens, and children's rooms. The string light is equipped with 400 high-performance LEDs that are very energy-efficient and emit bright light. This beautiful Christmas decoration is waterproof, making it suitable for both indoor and outdoor use. It features 8 different lighting effects: combination, waves, sequential, slow glow, flashing, slow fade, twinkle, and steady on. These string lights shine beautifully in your preferred pattern. Fun is guaranteed with this Christmas lighting! Note: The included USB is not waterproof, so this part must be protected from water, but thanks to the 5-meter long extension cable, the string light can be used outdoors since the cable and product are waterproof. The product has a USB connection, but the certified 5V USB power source is not included. Light color: Blue; Material: PVC; Length: 40 m; With 400 powerful LEDs; With 8 lighting effects; Waterproof; Indoor and outdoor use; With 5 m long extension cable.