The light color changes automatically. This is the A-type item for sale, but I opened the B-type for home use. When you turn it on, the light changes colors one after another, and the glitter inside moves, which is beautiful and quite impressive. It's a shame I can't upload a video. The photo shows it placed on the storage shelf above the bed. It's not that big, so it doesn't take up much space. Requires 4 AAA batteries or a USB cable. I think both children and adults will like it. This is a crane game prize. There may be scratches on the box. No price reduction, please.