Estimated Value (Sane Cost Guide): 5,000 gp
DMG Value: 501 gp - 5,000 gp
This ring has 3 charges, and it regains 1d3 expended charges daily at dawn. When you fail a Dexterity saving throw while wearing it, you can use your reaction to expend 1 of its charges to succeed on that saving throw instead.
Source: DMG p191