• Lightweight: Comfortable and senseless wearing experience and extremely light weight make it stand out from other smart wearable products
• Sleep monitoring: When you fall asleep, the ring automatically monitors your sleep quality and generates sleep reports to help you develop good sleep habits
• Heart rate monitoring: Adopting advanced dynamic monitoring technology to accurately record changes in your heart rate, allowing you to understand your own health status anytime, anywhere
• Deep waterproof: Fully enclosed structure, depth waterproof technology, swimming, diving or snorkeling can be worn, to meet your various waterproof needs

Specifications: 

• 7#: Circumference: 54.4cm, Diameter: 17.3cm
• 8#: Circumference: 56.9cm, Diameter: 18.1cm
• 9#: Circumference: 59.5cm, Diameter: 18.9cm
• 10#: Circumference: 62.1cm, Diameter: 19.8cm
• 11#: Circumference: 64.6cm, Diameter: 20.6cm
• 12#: Circumference: 67.2cm, Diameter: 21.4cm
• Bluetooth-compatible Version: BLE5.0
• Ring Battery Capacity: 20mAh polymer lithium battery
• Charging Case Battery Capacity: 450mAh
• Standby Time: 5-7 days
• Charging Time: 2-3 hours
• Main Chip Model: FR8016HA
• Heart Rate Sensor Model: HX3605
• Protection Level: IP68
• Ring Case Material: Stainless steel
• Fitness Features: Distance/Calories/All-day step tracking
• Heart Rate: Automatic timed heart rate tests, daily/weekly/monthly results, upper and lower limit alerts for abnormal data
• Sleep: Sleep data statistics, sleep ratio, sleep score, sleep analysis, average heart rate during sleep, daily/weekly/monthly results
• Blood Oxygen: Automatic timed SpO2 tests, all-day SpO2 charts, trend of the last 7 SpO2 measurements, SpO2 history, daily/weekly/monthly results
• Stress: Automatic timed stress tests, all-day stress test charts, stress history, daily/weekly/monthly results
• Other Settings: Unit format, low battery alert, abnormal data warning, segmented data viewing, cloud data sync options
• Platform Access: Own platform
• OTA Upgrade: Supported
• Operation Method: Timed sensor detection of body data, no touch, no buttons
• App Languages: Chinese, English, Arabic, Danish, German, French, Dutch, Czech, Romanian, Portuguese, Japanese, Spanish, Italian, Russian, Turkish, Persian, Traditional Chinese, etc. (17 languages)
• Compatible Systems: Android 5.0 and above; iOS 10.0 and above
• App Name: JSRing