RioRand&reg; Operated Outdoor and Indoor Battery Heart-shaped Iron Wire String Lights With 2 Functions for Christmas Party (Warm White, 2m 20 Leds) Powered by RioRand Advanced Technology uses 2 "AA" Batteries (not included) 20 LED's on one strand with 2 functions; 2 Modes : steady on , off Lights can be used indoors and outdoors (not summersible) 6.5ft 2m 20LED Batteries Heart-shaped Iron Wire light string