SY01 Digital Display Smart Ring Sleep Tracker Blood Oxygen Heart Rate Monitor with Charging Case •【Advanced Health Monitoring】Tracks sleep patterns,blood oxygen levels,and heart rate for comprehensive health insights. •【Durable Water Resistance】IP68+5ATM waterproof rating allows for use up to 50 meters deep,suitable for swimming and snorkeling. •【Premium Construction】Crafted from stainless steel with a gel-infused design for comfort and durability. •【Long-lasting Battery】Up to 5 days of normal use or 20 days on standby with a quick 1-hour charge time. •【Smart Gesture Control】Enables hands-free interaction with social media apps and remote camera control for convenient selfies. •【Versatile Compatibility】Works with Android 9.0+ and iOS 10.0+,integrating with WeChat and Apple Health for comprehensive fitness tracking. •【Customizable Fit】Available in multiple sizes from 8 to 14 to ensure a perfect fit for every user. Specifications: •Waterproof: IP68+5ATM waterproof (wearable for diving or snorkeling,supports waterproofing at a depth of more than 50 meters) •Material/Craftsmanship: Stainless steel+glue filling process •Size: • 8 (inner diameter 18.2mm) • 9 (inner diameter 19.0mm) • 10 (inner diameter 19.9mm) • 11 (inner diameter 20.7mm) • 12 (inner diameter 21.5mm) • 13 (inner diameter 22.3mm) • 14 (inner diameter 23.0mm) •Thickness: 2.6mm •Weight: about 3.2g •Chipset: PAR2860 - ultra-low power consumption,more durable •Memory: 512KB ROM+32 KB RAM •G-Sensor: SC7A20H •Bluetooth-compatible Version: 5.0 •MobileAPP-GPS: Yes •Heart rate sensor: HX 3918 •Battery Type: polymer pure cobalt battery •Operating temperature range: 0-50℃ •Battery Capacity: ring: 16mAh,charging case: 200mAh •Charging time: 1 hour •Theory Standby time: about 30 days •Normal using time: 3-4 days •Charging method: Charging case •Compability: Support Android 9.0 and above; IOS 10.0 and above •OTA upgrade: Support FOTA upgrade •APP: RWFIT Package included: •1 x Smart Ring •1 x Charging Case •1 x Charging Cable •1 x English Instruction Manual