1. Multifunctional Smart Ring, Blood Oxygen Monitoring; Heart Rate Monitoring; Sleep Monitoring; Step Counting; 10-Day Long Battery Life; Light And Lightweight To Wear; Ip68 Waterproof; Camera Control; Multi-Sport Mode 2. Thin And Comfortable To Wear 3. New Smart Ring, Healthy Life On The Ring, All-Weather Intelligent Monitoring, Integrating Health Into Your Daily Life, Multi-Dimensional Health Monitoring, Life Is Endless, Exploration Is Endless 4. Ultra-Low Power Consumption, Longer Lasting, And Smoother Use. The Ring Chip Uses German Dialog DA14531 To Bring You Excellent Performance And Efficient Smart Experience. The Smart Ring Injects A Powerful Core To Make Every Interaction Smoother. 5. Faster Charging And Longer Battery Life. It Uses A 17.5mAh Capacity Polymer Battery And Can Be Fully Charged Once With The Charging Compartment. It Can Stand By For About 60 Days, Which Greatly Improves The Battery Life Of The Ring. Description: 1. Size: Inner Diameter Approximately 21.5mm 2. Main Chip Model: German Dialog DA14531; Ultra-Low Power Consumption, More Durable 3. Body Storage Capacity (ROM + RAM): 128KB ROM + 96 KB RAM 4.Battery Type: Polymer Pure Cobalt Battery 5. Working Temperature: 0~50℃ 6. Charging Time: 2 Hours 7.Theoretical Standby Time: 10 Days-15 Days 8.Usage Time: 7 Days-9 Days 9. Operation Definition: The Ring Has No Touch Or Buttons; The App Initiates Exercise And Functional Testing Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:Silver Material:Stainless Steel Package Contents: 1x Smart Ring 1x Charging Cable 1x Charging Compartment 1x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.