This string of lights is perfect for illuminating any decorative project. It is suitable for Christmas, parties, weddings, and other holidays. The string is equipped with 400 energy-saving LEDs that create a magical light display. It features 8 different lighting effects: combination, waves, sequential, slow glow, flashing, slow fade, twinkle, and steady on. It is a great decorative accessory for lighting both indoor and outdoor spaces. Note: The included USB is not waterproof, so this part must be protected from water, but thanks to the 3-meter long cable, the Christmas decoration can be used outdoors, as the cable and product are waterproof. The product has a USB connection, but the certified 5V USB power source is not included. Light color: Cool white; Material: Plastic; Total length: 40 m; Voltage: 5V, DC; Power: 5 W; Number of LEDs: 400; Distance between each LED: 10 cm; Comes with a 3 m long extension cable; With strong plastic bulbs; With 8 lighting modes; With USB connection; Suitable for indoor and outdoor use.