Jukebox Ring

Plays a random assortment of music you've heard.
Overview
The 
As an unreleased or inaccessible item, it has no practical use in normal gameplay. The ring exists only as a named game object, and no in-game method is provided to obtain or equip it. Its concept stands out because it implies portable soundtrack control rather than a combat or utility effect, which is unusual for a ring.
Because the item cannot be acquired, there is no strategy for using it and no interaction with other equipment or gameplay systems beyond its implied function.
Official description
Plays a random assortment of music you've heard.