R09M Health Monitoring Smart Ring Multifunctional Bluetooth Smart Finger Ring - Black/Size 20 •NORDIC NRF52832 chipset,multiple sensors running in sync for strong performance •IP68 waterproof and dustproof,no worries about daily use •New sleep staging algorithm to monitor key health data: blood pressure,heart rate,to determine the state of sleep: light sleep,wakefulness,deep sleep,and analyze the quality of sleep •By tracking your heart rate,you can understand what your physical state is like during the day,during exercise,and during relaxation,and you can promptly check your physical condition in advance when your heartbeat is irregular or too rapid or too slow •Monitor your heart rate anytime,anywhere. Open the app to view the heart rate data for the corresponding time period •Specifications: •Ring inner diameter: Size 18: 17.8mm,Size 20: 19.8mm,Size 22: 21.8mm •Chipset: NRF52832 •APP: Smart Health •Compatible System: Android 6.0 (inclusive) and above,IOS11.0 (inclusive) and above •RAM Memory: 64KB •FLASH Memory: 4Mb •Screen: no •Encoder: not supported •Touch: not supported •BT: 5.2 low-power Bluetooth chip •Bluetooth call: not supported •WIFI: not supported •NFC: not supported •Accelerometer: STK8321-W •Gyroscope: not supported •Heart Rate Sensor: HX3605 •GPS: not supported •Battery Type: Polymer Li-ion •Battery Capacity: 18mAh •Charging Method: Magnetic Charging •APP Smart Health function: •Steps,kilometers,calories,exercise data recording •Heart rate measurement,blood oxygen measurement,blood pressure measurement,Sleep health monitoring •Multiple sports modes,running,cycling,skipping,fitness,mountaineering,yoga,golf,dance •Supported languages: English,Simplified Chinese,Traditional Chinese,Russian,Ukrainian,German,French,Italian,Spanish,Portuguese,Polish,Greek,Romanian,Hungarian,Czech,Slovak,Irish,Croatian,Swedish,Danish,Finnish,Arabic,Persian,Norwegian,Japanese,Korean,Thai,Vietnamese •Waterproof Level: IP68 •Charging time: about 1-2 hours •Life time: 5-10 days of use,15-20 days of standby •Appearance material: resin + stainless steel Package included: •1 x Smart Ring •1 x Charging Cable •1 x English User Manual