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 + 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