Solar Powered & Auto On/Off: The Christmas tree lights are solar powered, no extra electricity costs or battery replacement. The light sensor charges the lights during the day and automatically turns them on at night. Flexible DIY Strings: The strings are 12m long with ultra-thin and flexible silver wire that can be shaped as you wish, with 360° even illumination in all directions. Easy to store and ready for next use. 8 Modes & Memory Function: Choose from 8 lighting modes: waves, combination, sequential, slo-glo, chasing/flash, slow fade, twinkle/flash, and steady on. The built-in memory chip saves your last mode, so you don't need to set it every day. Waterproof: With an IP65 rating, these solar string lights can withstand all weather conditions, including heavy rain and snow, making them suitable for both indoor and outdoor use. Wide Application: These solar string lights are perfect for Halloween, Christmas, weddings, holidays, gardens, yards, lawns, fences, porches, trees, roofs, and balconies. Size and Packaging: Each set is 30m with 300 LED lights, total 2 sets.