Solar String Lights, Dolucky 72ft 200 LED Waterproof Outdoor Decoration Lights (Blue) plastic Imported Extra Durable: The string lights have more than 10000 hour lifespan, durable strings are made of extra thick and conductive copper core Solar Powered: No external power supply required, rechargeable battery can get fully charged in 8 hours by the sunlight and works up to 12 hours 8 Lighting Mode & Memory Function: Combination, Waves, Sequential, Slo-Glo, Chasing/Flash, Slow fade, Twinkle/Flash, Steady on, you can freely switch among the 8 optional light effects; The memory function make the string light keep the same mode as the last time Waterproof: The String lights have IP65 waterproof level, so you dont have to worry about using them on a rainy or snowy day Easy to install: No extra tool required, just need simply stick the solar panel stake into the ground and put the string at any places you want