Product Description Material: stainless steel + epoxy resin Main control chip: Jerry AC6323 Sensor: Goodix GH3018 Ring Battery Capacity: 20MAH Usage time: 3-5 days Standby time: 7-10 days Waterproof level: IP68 Compatible System: Android 5.1 or above, IOS 8.0 or above OTA update: support Functions: steps, kilometers, calories, exercise data logging, heart rate measurement, blood pressure, oxygen measurement, sleep health monitoring, smart photography, making friends, various modes of movement, running, cycling, rope jumping, walking, climbing, yoga, golf, dancing. Supported languages: English, Simplified Chinese, Traditional Chinese, Russian, Ukrainian, German, French, Italian, Spanish, Portuguese, Polish, Greek, Romanian, Hungarian, Czech, Lithuanian, Irish, Croatian, Swedish, Danish, Finnish, Arabic, Persian, Norwegian, Japanese, Korean, Thai, Vietnamese