With built in Sensors, the mouse cat toy could recognize various scenes and obstacles, unbound effectively. It runs freely on different floors without hitting the furniture.For extra fun, it can simulate mouse sound to keep cats thrilled. Furious mouse makes your cat become a perfect hunter.Replaceable Tails with Different FunctionsTwo different mouse tails, one is a natural goose feather; another is filled with catnip and Crinkle.Mouse SoundRun with the mouse sound, helping cats to find, to catch and to exercise indoor.USB RechargeableWith 1000 mAH rechargeable battery, the squeaky mouse cat toy works for three days by one charge.Motion ActiveThe interactive cat toy imitates mouse behavior, awaken hunting instincts.Rotating TailAttract the cat's attention and make the cats full of passion through the rotating action.Night VisibilityWith luminescent materials glowing wheels, cat toys continue the fun of chasing in the dark.Package Contents1 x Crazy Mouse1 x USB Charging2 x Mouse Tails1 x Colorful Packing Box