Vibration activation: in the intelligent mode, the cat's paw vibrates to trigger the operation, so as to amuse the boring time and release the vitality of meow. Feather play with the cat: feather movement appears randomly to satisfy cat's hunting nature, which is funny. Move randomly: when encountering an obstacle, teaser will turn automatically, and there is no need to worry about it being stuck in the corner. Replaceable feather: the feather is made of makaron natural turkey feather, which is soft and safe, and is replaceable. Automatic felt: with the use of cleaning circle, it can tease the cat and automatically take away the hair on the ground. How long can I play on a single charge? In smart mode, you can play intermittently for about one day Non-stop play (only feathers stick out), it can play for about 4 hours Non-stop play (feathers stick out and running),it can play for about 2 hours This teaser with replaceable feather and automatic felt, not only can play with the cat, but also take away the hair on the ground, making cat owner more convenient, which is a good helper. Specifications Size: 156*156*92mm Charging voltage: 5V Battery: polymer lithium battery Battery capacity: 500mAh Storage mode: USB charging Signal light: red - to be charged; blue - charging; green - fully charged.