[Responsive Yoyo for Beginners] K2 PLUS is one of the top recommended functional entry-level yo-yos. It is a kids yoyo, ideal for beginners to practice basic string tricks 1A, 3A, and 5A. With just a gentle tug, it returns to your hand easily.[Dual Purpose Yoyo - Also Pro Unresponsive Yoyo] Yo-yo K2 is a responsive yoyo (slim design), and the package includes an unresponsive conversion kit. When you advance to the next level, simply change the response system with the included parts, and you will have a new unresponsive yoyo. No need to buy another yoyo, offering great value.[Made of high quality PC], featuring a beautiful crystal color, wear-resistant, pollution-free, and safe for kids to use. Durable and sturdy. Perfect gift for kids, beginners, as a Christmas or birthday gift.[IMPORTANT] 1. For responsive yoyo mode, if the yoyo does not return sensitively, it is advised to add a small amount of lubricating oil or rust-proof oil to the bearing (apply oil inside and outside of the bearing). 2. After changed to unresponsive mode, it will not return to your hand when you pull it up. You will need to learn a trick called a "bind" to bring the yoyo back.Body Shape: Butterfly Diameter: 55.33 mm Width: 42.67 mm Gap Width: 4 mm Bearing Type: Center Trac Axle: 3mm * 8mm Surface: Shining Finish Style: String Trick (1A, 3A, 5A) Response Pad: Silicon Pad (random color, cannot specify color) Twist-Apart String Length: 43.31 in / 110 cm Material: PC Color: Blue Package Contents: 1 x yoyo 1 x puller 5 x replacement strings (random color, cannot specify color) 1 x storage bag 1 x 10mm screw 1 x 8mm bearing Only the above package content, other items are not included.Note: Light and different displays may cause the color of the item in the image to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.