R88 Smart Ring Fitness Tracker, Supports Health Monitoring Camera Control 1. Low Power Consumption: Longer battery life for all-day use. 2. Ultra-Long Standby Time: No need for frequent charging, stay connected. 3. Gesture Control: Easily turn pages, control music playback, and more with simple gestures. 4. Multifunctional: Supports control of TikTok videos, music playback, and other smart functions. 5. Stylish and Comfortable Design: A stylish and durable smart ring suitable for everyday wear. 6. Convenient and Easy to Use: Seamlessly integrates into your digital lifestyle, freeing your hands and providing ultimate convenience. About Product: 1. System requirements: Android 8.0 and higher versions, IOS10.0 and higher versions 2. Chipset: AC6323 3. Memory: Flash：4Mbit （RAM：73KB） 4. Bluetooth: 5.3 5. Heart rate sensor: GH3018 6. Battery Type:Polymer Pure Cobalt Battery 7. Operating temperature range: (-20 to 50 degrees Celsius) 8. Battery capacity: 15mAh 9. Standby time: About 7-9 days 10. Charging method: charging case 11. Waterproof Level: 5ATM 12. APP: SmartHealth 13. Material: Case: Aluminum alloy 14. Specifications Dimensions: Size 7: Inner Diameter 17.4mm; Circumference 54.6mm Size 8: Inner Diameter 18.2mm; Circumference 57.1mm Size 9: Inner Diameter 19mm; Circumference 59.6mm Size 10: Inner Diameter 19.9mm; Circumference 62.4mm Size 11: Inner Diameter 20.7mm; Circumference 64.9mm Size 12: Inner Diameter 21.5mm; Circumference 67.5mm Size 13: Inner Diameter 22.3mm; Circumference 70mm Size 14: Inner Diameter 23mm; Circumference 72.5mm 15. APP support languages:Simplified Chinese, Traditional Chinese, English, French, Italian, Spanish, Portuguese, Japanese, German, Polish, Hungarian, Russian, Ukrainian, Korean, Vietnamese, Thai, Croatian, Swedish, Norwegian, Danish, Finnish, Czech, Slovak, Irish, Arabic, Hebrew, Persian (Iranian), Turkish, Romanian, Greek, and Indonesian Functions: 1. Heart rate, blood pressure, blood oxygen monitorin