The Aurora is, without doubt, the current king of all light-up yo-yo's, period. As of writting this, it is the newest Magicyoyo product, making the design mainstream, and technology up to date.
t is made up of a 6061 aluminum body, 2 chip-boards and poly-carbonate caps for the sides. A big problem for light-up yo-yo's in the past was vibe, caused by the chip-boards and uneven weight distribution, yet the Aurora has strongly reduced vibe.
The package includes free 1 pcs Allen hex.  The Allen hex key to remove the cap. Use the Allen key to go through the threads inside the yo-yo and push on the plastic cap from the inside, sliding it out of place.
Gifts come with 1x replacement yoyo strings,
The Aurora comes in 5 different yoyo colors,and for the solid LED color - each yoyo has a unique LED color to match,for the changling LED color -the lights change in a gradient,alternating between Red, Orange, Yellow, Green and Blue.