Good Girl Laser Mouse Cat Toy The Good Girl Laser Mouse Cat Toy projects a mouse-shaped laser beam that your cat will love to chase. Cats love chasing the laser dot, but have they ever seen a laser mouse? The action of the moving laser mouse will entice your cat to play, paw and pounce, encouraging their natural wild instincts. This is a great way for your to bond with your pet and give it some much-needed exercise. 3x LR44 batteries included. Battery Replacement: Unscrew the top of the toy and tilt to remove current batteries. Drop in replacement batteries. Always replace all batteries at the same time. Replace the screw-on top to the toy. Ensure the top is securely tightened before reusing the toy. Non-rechargeable batteries are not to be recharged. Different types of batteries or old and new batteries are not to be mixed. Only batteries of the same or equivalent type are to be used. Batteries are inserted with the correct polarity. Remove exhausted batteries from the toy. Remove batteries from the toy when not in use.