Animated Electronic Yellow Swallowtail Butterfly in a Jar - Tap to Activate, LED IlluminatedSimply tap the jar to activate the butterfly's realistic action! Your butterfly will move for around two minutes the batteries have automatic standby so no need for a power button! A blue LED light illuminates the jar and stays on until 2 minutes after you have tapped the jar Takes 3 x AAA batteries (not included) The glass butterfly jar measures approximately 3. 5" x 3. 5" x 6. 5" Ever dreamed of keeping a butterfly in a jar forever? Now you can!