LycheeBattery Operated Portable Outdoor and Indoor Fairy String Lights With 8 Functions for Room Home Garden Christmas Party Decoration (White, 6.4M 64Leds) uses 4 "AA" Batteries (not included) 64 LED's on one strand with 8 functions C8 functions controlled by button : combination, In Waves, Sequential, Slo-Glo, Chasing/Flash, Slow Fade, Twinkle/flash, steady on Lights can be used indoors and outdoors (not summersible)21ft 6.4m Batteries light string (White) 21ft 6.4m Batteries light string (White)