•【Advanced Sleep Tracking】 Monitor your sleep patterns,heart rate,and blood oxygen levels with precision using the intelligent ring design •【Durable Construction】 Crafted with stainless steel and featuring IP68 waterproofing for long-lasting performance in various conditions •【Extended Battery Life】 Enjoy 3 - 4 days of normal use or 16 - 20 days of standby time with the efficient polymer cobalt battery •【Comprehensive Health Monitoring】 Track multiple sports modes,heart rate,sleep quality,and blood oxygen levels with ease •【Seamless Connectivity】 Bluetooth-compatible 5.1 technology ensures stable connections with compatible devices for real-time data syncing Specifications: •Material: Stainless steel+glue filling process •Thickness: 2.5mm •Waterproof Rating: IP68 •Chipset: German Dialog DA14585 (ultra-low power consumption) •Memory: 128kb ROM+96 Kb RAM •G-Sensor: SC7A20 •Bluetooth-compatible Version: 5.1 •Heart Rate Sensor: Tianyi 3918 •Battery Type: Polymer pure cobalt battery •Battery Capacity: 216mAh •Charging Time: 2 hours •Operating Temperature Range: 0-50℃ •Compatibility: for Android 9.0 and above; iOS 10.0 and above •Compatible Software: Jring Package included: •1 x Ring •1 x Charging Case •1 x English User Manual