Feature: 1. Premium Material: This health ring is made from high strength stainless steel and zirconia ceramic, ensuring durability, elegance, and aesthetic appeal. 2. Multifunction Health Tracker: With multiple functionalities, the smart ring can monitor your sleep, body temperature, and steps, giving you up to date health data at your fingertips. 3. Fitness Companion: Perfect as an exercise ring, it records your daily steps, supporting your fitness goals and tracking your progress. 4. Sleep Monitoring: In addition to step counting, the ring also analyses your sleep duration and quality, to provide comprehensive health insights. 5. Ideal Gift: This ring makes an ideal gift for all occasions, including birthdays, anniversaries, Thanksgiving, Christmas, and Valentine's Day. Specification: Item Type: Smart Health Ring Material: Stainless steel, zirconia ceramic, electronic components Battery: 18mAh lithium Battery (Built in) Battery Life: 3 to 5 days Charging Time: 45 minutes Applicable size: Ring Number:Number 17, Applicable Finger Circumference:56mm / 2.2in, American Size:Number 7 Ring Number:Number 18, Applicable Finger Circumference:60mm / 2.36in, American Size:Number 8 Ring Number:Number 19, Applicable Finger Circumference:64mm / 2.52in, American Size:Number 9 Ring Number:Number 20, Applicable Finger Circumference:69mm / 2.72in, American Size:Number 10 Ring Number:Number 21, Applicable Finger Circumference:73mm / 2.87in, American Size:Number 11 Ring Number:Number 22, Applicable Finger Circumference:75mm / 2.95in, American Size:Number 12 . Package List: 1 x Smart Health Ring1 x Chaging Cable1 x Manual