This is an original crystal necklace crafted by a first-class precious metal jewelry craftsman. It is completely handmade, and therefore, it has been carefully and painstakingly completed. It is a valuable item that cannot be obtained anywhere else. It is battery-operated, and a light turns on when you twist the bottom cap. It can be used for purposes other than a necklace. The light-emitting diode changes colors and is very beautiful. It was made a long time ago and shows its age, but it also has a Showa retro feel and a good taste. It's first-come, first-served, so please take this opportunity to purchase it.