The Yomega Spectrum EX has Bearing System technology that delivers super long spins that make it easy for kids of all ages to perform the classic tricks. This bearing yoyo includes 5 different spacer sizes to adjust your gap. Customize your Spectrum for looping, responsive or non-responsive play! Great for intermediate to advanced throwing skills. With a flick of the wrist, the Spectrum EX spins or sleeps at the end of the string, allowing maximum time for the player to perform string tricks. The player is allowed complete control and determines when the trick is complete by calling the Spectrum EX back to the hand with a final flick of wrist. The Spectrum EX features LED lights that make for explosive colors and instant entertainment with just one throw of the yo-yo! By flipping the switch, you can choose which color lights you want! It also features a transaxle and a starburst response system, which allows for intermediate, pro and advanced level of play. It contains multi-color LEDs that are motion activated. (2) button cell batteries included. - Please remove plastic tabs from each side of the yoyo, prior to playing with the Spectrum - Do not overtighten the yoyo. This will cause damage to the inner portion of the yoyo.