Oura Ring 4 Brushed Silver sells on Amazon. I think the price is very good. Please read some of the reviews and see people thought of the product.**If you’re not sure whether to buy, add to cart, and you can come back to it later!**

ACCURACY – SMART SENSING – Oura tracks over 50 health metrics, including sleep, activity, stress, heart health, metabolic health,and womens health metrics. Smart Sensing technology adapts to you delivering accurate, continuous data, day and night ACCURATE SIZING ESSENTIAL – Oura Ring 4 uses unique sizing different from standard jewelry rings; use the Oura Ring 4 Sizing Kit to find your perfect fit before purchasing