Fortune Products FB-40W Fairy Berries on a String Light Set, 13' Length (Case of 12 Strands) 12 string lights can be used to adorn trees, shrubs, or displays for parties or holidays White LEDs illuminate 12 round berries on each string and fade on and off slowly to create a twinkle effect Up to five interconnected string lights can run on three AA batteries (sold separately) Each string light measures 13' long; berries measure 3/4" in diameter and are spaced 12" apart