Happy Birthday LED Decorative String Lights are the
best color changing Birthday celebration decorations you'll find
anywhere. Hang it from the ceiling or wall, or attach it to birthday
crafts, the choice is yours with Battery Powered Birthday Celebration
String Lights. To activate your "Happy Birthday" Decoration Lights, slide the switch
on the battery pack for slow color changing lights in all of the
letters. 3 AA batteries are included and replaceable.