Luminous Responsive Yoyo, yoyo balls light up K1Plus comes with regular flating stockMade of ABS, Style String Trick 1A, 3A, 5A, Durable and has high performanceKeep the Noctilucent yoyo under the light or in sunlight for a few minutes to charge the glow effectHeavier than before and have more fun without weight rings. A perfect toy for children, friends, families etc. Recommended for childrens daily practice or competition.If a string gets stuck 1. Remove the string first 2. Check if the ball is loose and the two hemispheres need to be tightened properly 3. Fasten the string properly. The most important thingApplicable moves 1A, 3A, 5AWeight 65gDiameter 51.03 mmBall width 41.01 mmShaft width 4.38 mmBearing 8 ball Ushaped shaftScrew M416mmColor blueGreenMaterial ABSPackage contents1ball1gloves1velvet bag5rope random color, specified color is not acceptedOnly the above package contents, other products are not included.Note Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is13 cm.