As the name implies, the undercover mouse moves quickly. The random speed under its durable nylon cover, slow down and reverse the direction -hidden mouse skaters just stretched out from the cat's sight. In fact, its movements are real, and you and your cat will swear that there is a live mouse in the house. This is the secret of the stealth movement of its successful secret mouse, which can make your hunter/predator's intuition to its peak. feature: ** 100 % new and ** Four models, slow, medium, fast, random** Toys, your cat cannot resist! ** For cats of all ages, interesting sports help stop capture and scraping! ** It works well on the carpet and floor! Easy assembly: 1. Use the small Philips head screwdriver to remove the battery cover from the basics "BB". 2. As shown in the figure, insert 3 C batteries (not included) into the battery box, and then connect to the battery plate again. 3. As shown in the figure, insert the wand "DD" into the basics "BB". 4. As shown in the figure, "CC" is placed on the foundation "BB". 5. As shown in the figure, the hat "EE" is placed on the foundation "BB". 6. Rotate the hat "EE" clockwise until it is locked. 7. Just connect the mouse wand, the ACCACH cover, and press the button for several hours to exercise and fun! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.