Vring-3 Frosted Bluetooth Sleep Health Monitoring Smart Ring Stainless Steel Finger Ring, with Charging Case - Black\/Size 9 \u2022Smart chips: With powerful computing power and floating-point arithmetic technology, it achieves faster running speed, higher security, and longer transmission distance \u2022Sleep monitoring: When you fall asleep, the ring automatically monitors your sleep quality and generates a sleep report to help you develop good sleep habits \u2022Heart rate monitoring: Through the combination of photoelectric sensors, accelerometers, optical heart rate sensors, optical blood oxygen sensors, and multiple sensors run synchronously \u2022Blood oxygen monitoring: The high-precision optical blood oxygen sensor can monitor the blood oxygen value by emitting red light and infrared light, and turn on all-weather blood oxygen monitoring \u2022Exercise 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 \u2022IP68 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: \u2022Waterproof \u2022IP68 \u2022Material \u2022Case: stainless steel \u2022Size \u2022 8(Inner diameter 18.2mm) 9(Inside diameter 19.0mm) 10(Inside diameter 19.9mm) 11(Inside diameter 20.7mm) 12(Inside diameter 21.5mm)Thickness 2.6mm \u2022Weight \u20222.9g \u2022Chipset \u2022AB2026B3 \u2022Memory (ROM+RAM) \u2022ROM 120M, RAM 64KB \u2022G-Sensor \u2022SC7A20H \u2022Bluetooth Version \u20225.2 \u2022MobileAPP-GPS \u2022Yes \u2022Heart rate sensor \u2022HX3918 \u2022Battery Type \u2022Polymer battery \u2022Operating temperature range \u20220-50\u2103 \u2022Battery Capacity \u202218mAh \u2022Charging time \u20221H \u2022Theory Standby time \u202210 days -15 days \u2022Normal using time \u20223 days 5 days \u2022Charging method \u2022Charging case \u2022Software Function and App \u2022Compatibility \u2022Support Android 5.0 and above; for Apple IOS 10.0 or later \u2022Compatibility Software \u2022working with Da Rings \u2022Device software functions \u2022Operation \u2022Ring no touch, no button; App launch movement and function test \u2022APP software functions \u2022module \u2022remark \u2022Activity \u2022Distance\/calories\/daily steps statistics \/ 7-day goal achievement\/effective activity, etc \u2022Multisports \u2022There are 24 kinds in total: 19 kinds of regular sports +5 kinds of GPS sports \u2022Heart rate \u2022APP launches heart rate test\/all-day dynamic heart rate trend and data analysis\/heart rate data analysis\/Recent 7 heart rate measurement trend\/heart rate history data \u2022Sleep \u2022Sleep data statistics, sleep proportion, sleep score, sleep analysis, average sleep heart rate, etc \u2022Blood oxygen \u2022APP initiated blood oxygen test\/recent 7 blood oxygen data\/Recent 7 blood oxygen saturation measurement trend\/historical blood oxygen data \u2022HRV \u2022APP initiated HRV test\/nearly 7 HRV data\/average HRV during sleep\/stress history data \u2022Stress \u2022APP initiated blood oxygen test\/Nearly 7 pressure measurement trends\/pressure history data \u2022Others \u2022Unit format, sedentary reminder, low battery reminder, heart rate warning \u2022WeChat and for Apple \u2022Access WeChat Sports and for Apple Health \u2022APP multi-Language support \u2022Multiple languages \u2022Support OTA \u2022Supports Fota upgrades \u2022APP \u2022Da Rings Package included: \u20221 x Smart Ring \u20221 x Charging Case \u20221 x English User Manual Package included: \u20221 x Smart Ring \u20221 x Charging Case \u20221 x English User Manual