Ideal size and design 4.1 cm diameter ideal size, smaller than traditional automatic cat ball toys. This size allows cat paws to move easily, enhancing hunting drive, and reduces the risk of the ball getting stuck under a sofa or in corners. Smart interactive play Smart motion sensing technology detects contact as your cat engages with the ball. The ball rolls, moves, and stops automatically to encourage continued play and natural hunting behavior. Consistent indoor entertainment for indoor cats that move around tables, under furniture, and through tight spaces. The selfrotating design helps prevent the toy from getting stuck in corners or under furniture. Rechargeable and travelready Rechargeable via the included USB charging cable. Lightweight and portable for holidays and travel. All materials are safe for cats. To use, fully charge the toy; there are no visible charging lights. Press and hold the button for 12 seconds to turn on the light, and the toy can rotate when shaken or patted.