Smart Ring for Women, Fitness Tracker Ring with Heart Rate, Blood Oxygen, Blood Pressure, Sleep Tracker, Step Tracker Gold (7-13#)

[US Standard Sizing] The spywkn Smart Ring is engineered to US ring sizes for that just-right fit. Know your size? Lock in your perfect match now. Not 100% sure? We highly recommend getting our Sizing Kit first. Our lab data shows 92% of sizing kit users avoid returns and have a better fit experience.

Package Dimensions: 5.04 x 5 x 0.75 inches Item Weight: 0.08 Kilograms ASIN: B0F532DV67 Item model number: ALF-SMR10-F Batteries: 1 Nonstandard Battery batteries required. Customer Reviews: 2.8 out of 5 stars Date First Available: April 16, 2025 Manufacturer: spywkn