The Electronic Flutter Butterfly Cat Toy is a winged toy that provides your cat with a stimulating new exercise. Its spirited fluttering movement triggers their natural hunting instincts. A rotating butterfly toy thats satisfies your cat's instinct to hunt and chase. Includes 2 butterfly attachments. Press down on the centre cap to snap lock onto the stem. Removing Butterfly: Grasp the stem firmly and pull up to disengage the centre cap from the base stem. Battery Installation: Open the battery box cover and insert 3 AA batteries, as indicated by the polarity marks, close and secure the battery box.