This is an Aluminum yoyo with Multi Colored LED lights.
Mulit Colored Lights - Lights change when the yoyo spins. Alternating between Red, Orange, Yellow, Green and Blue.
When the button battery runs out replace them with a new one using the Allen hex key to remove the cap. Use the Allen key to go through the threads inside the yoyo and push on the plastic cap from the inside, sliding it out of place.
