V8 Rhinestone Decor Sleep Heart Rate Health Monitoring Smart Ring with Charging Case - Silver/Size 9 ?[Smart chips]With powerful computing power and floating-point arithmetic technology,it achieves faster running speed,higher security,and longer transmission distance ?[Sleep monitoring]When you fall asleep,the ring automatically monitors your sleep quality and generates a sleep report to help you develop good sleep habits ?[Heart rate monitoring]Through the combination of photoelectric sensors,accelerometers,optical heart rate sensors,optical blood oxygen sensors,and multiple sensors run synchronously ?[Exercise monitoring]You can set a daily exercise goal,5000-10000 steps,record steps,kilometers and calories at any time,apply different sports modes and open the exercise track on the APP at the same time,record the movement track of each time ?[IP68 waterproof]There is no need to take off in washing,showering,swimming and other wading scenes,and it is not affected by sweat,and the physical condition under sleep and activity is continuously monitored Specifications: ?Material: Case - Stainless Steel ?Size: 7 (Inner Diameter 17.3mm), 8 (Inner Diameter 18.1mm), 9 (Inner Diameter 18.9mm) ?Chipset: AB2026B3 ?Memory (ROM and RAM): Max Frequency 120M,RAM 64KB ?Gravity Sensor: 3-Axis Pedometer Sensor SC7A20H ?Bluetooth Version: 5.2 ?Mobile App - GPS: Available ?Heart Rate Sensor: 3918 ?Battery Type: Polymer Lithium Battery ?Operating Temperature Range: 0-50℃ ?Ring Battery Capacity: 18mAh ?Charging Case Battery Capacity: 200mAh ?Charging Time: 1 Hour ?Standby Time: 10-15 Days ?Usage Time: 3-5 Days ?Charging Method: Charging Case ?Compatibility: Supports Android 5.0 and above; iOS 10.0 or higher ?App Multi-Language Support: Multiple Languages ?OTA Support: Supports FOTA upgrades ?Application: Da Rings Package included: ?1 x Smart Ring ?1 x Charging Cable ?1 x Charging Case ?1 x English User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.