R03 Sleep Tracker Blood Oxygen Heart Rate Monitor Multifunction Smart Ring with Charging Case - Black/Size 8 •【Advanced Health Monitoring】Track sleep,heart rate,blood oxygen levels,and stress with precision using the R03 smart ring •【Long-lasting Battery】Enjoy 5-7 days of active use or up to 15 days on standby with a quick 1-hour magnetic charging time •【Waterproof Design】5ATM water resistance rating allows for worry-free use during swimming and other water activities •【Multi-Sport Modes】Track various exercises and capture photos,all controllable through the QRing app •【Wide Compatibility】Works with Android 5.1+ and iOS 8.0+,supporting over 30 languages for global use •Specifications: •Ring size: 7: Inner Diameter 17.9mm, 8: Inner Diameter 18.3mm, 9: Inner Diameter 19.2mm, 10: Inner Diameter 20mm, 11: Inner Diameter 20.9mm, 12: Inner Diameter 21.6mm •Chipset: RF03 •Compatible System: Android 5.1 (inclusive) and above,IOS 8.0 (inclusive) and above •FLASH memory: RAM 208KB FLASH 512KB •Screen size: no •Resolution ratio: no •Encoder: not support •Touch type: not support •BT: 5.0 low-power Bluetooth chip •Bluetooth call: not support •WIFI: not support •NFC: not support •Acceleration sensor: Sitronix STK8321 •Gyroscope: not support •Heart rate: Vcare VC30F •GPS: not support •Battery type: polymer lithium ion •Ring Battery Capacity: 15mAh •Charging Case Battery Capacity: 200mAh •APP: QRing •Function: Step count,sleep,heart rate,exercise data recording,health monitoring,blood pressure,blood oxygen measurement,multiple sports modes,photo taking •Support languages: Danish,Ukrainian,Russian,Croatian,Hungarian,Hindi,Indonesian,Turkish,Hebrew,Greek,German,Italian,Latvian,Czech,Slovak,Slovenian,Japanese,French,Polish,Thai,Estonian,Swedish,Lithuanian,Simplified Chinese,Traditional Chinese,Romanian,English,Dutch,Portuguese,Spanish,Vietnamese,Arabic,Korean,Malay •Waterproof level: 5ATM •Charging time: about 1 hour •Battery life: 5-7 days of use,15 days of standby •Appearance material: stainless steel Package included: •1 x Smart Ring •1 x Charging Cable •1 x Charging Case •1 x English User Manual