Features:[Responsive Yoyo for Beginners] K2 PLUS is one of the most recommended 2 functional beginner yoyos. It's a kids' yoyo, great for beginners to practice basic string tricks 1A 3A 5A, just a gentle tug on the string, and it will easily return to your hand.[Dual-Purpose Yoyo - Also Professional Non-Responsive Yoyo] The K2 yoyo is a responsive yoyo (slim), the package includes a non-responsive. When you level up, just replace the string with it (included), and you'll get a new non-responsive yoyo, no need to buy another yoyo, a great value for you.[]Made of high-quality PC, beautiful crystal color, wear-resistant, pollution-free, safe for children to use. Durable and sturdy. Perfect gift for kids, friends, beginners, as a Christmas gift or birthday present.[IMPORTANT]1.For responsive yoyo mode, if the yoyo does not return sensitively, it is recommended to drop some lubricating oil or anti-rust oil into the bearing (lubricate the oil on the inside and outside of the bearing).2.After switching to non-responsive yoyo, it will not return to your hand when you pull it up. You need to learn a trick called a bind to get the yoyo back. Material: PC Color: bluePackage contents: 1 x yoyo, 1 x ball string.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.