Three.0 I like Helzberg's, but I do not like that they do not warranty their products for almost any length of time Except you fork out added to the lifetime warranty. I bought my granddaughter an "H" necklace & a lot less than three months later, the chain clasp broke. https://multifunctionelectricshav81134.dm-blog.com/31898883/the-smart-trick-of-cocktail-ring-jewelry-that-nobody-is-discussing