IMAGE 2pcs 3" Warm White Mood Light Garden D&eacute;cor Floating Ball For Wedding Holiday Christmas Party Pool D&eacute;cor Simply Use: throw them in water and it will light up autodidactically. Battery last time:30-70hours Color : warmwhite color, flash on Mini Size: dia. 3"(8cm) Package include: 2 * LED floating ball, 4 * CR2032 coin batteries (inside the ball)