Worldwise-Petlinks: Cheese Chaser. This puts the fun of a mouse chase in your hands, it has an easy one-button control that keeps your cat in hot pursuit. This 5x6-3/4x2-1/4 inch package contains one mouse and one remote control. Two AA batteries are required (sold separately). Petlinks products are principally made from recycled, reclaimed, renewable and certified organic materials. For best results, the remote control (charger) and toy should have direct line of sight, avoiding obstacles. Use toy on smooth, hard and clean surfaces. Remove any hair that may be wrapped around the wheels or axles. For longest battery life, be sure to disconnect toy from charger right after toy is fully charged (when red charging light goes out). Slide switch on charger to OFF position when you are done playing. Imported.