This 2-pack of expandable Christmas string lights features 300 high-quality LED bulbs and 100 feet of green wiring, delivering bright yet gentle illumination. You can connect up to four strands together to cover a wider area, the green wire blends seamlessly with natural nighttime scenery, making it perfect for both indoor and outdoor decor. It offers 8 adjustable lighting modes to suit different occasions and moods, including combination, in waves, sequential, slow glow, chasing/flash, slow fade, twinkle/flash, steady on; simply press the round button on the adapter to switch between modes, creating ideal ambient lighting for family gatherings and holiday celebrations. The lights also have a timer and memory function: long-press the plug button to activate the timer, which will keep the lights on for 6 hours and off for 18 hours each day, the built-in memory chip will automatically save your last selected lighting setting so you do not need to reset it every time. Boasting an IP65 waterproof rating, these outdoor string lights can withstand various weather conditions, making them suitable for year-round decor, they make fantastic additions to gardens, bistros, balconies, terraces, pergolas, gazebos, tents, umbrellas, cafes, bedrooms, more. Note that the power adapter itself is not waterproof. These outdoor string lights are UL safety certified, an output voltage of 29V, staying cool to the touch even after hours of use to ensure safe use. They also use very little electricity, so you can leave them running continuously all day long. Available sizes: 200FT 600LED, 100FT 300 LED, 66FT 200 LED. Available colors: 1 Pack Blue & 1 Pack White, 1 Pack Warm White & 1 Pack Multicolor, Multicolor, White, Warm White, Blue