Health Smart Titanium Steel Ring Waterproof Blood Pressure Oxygen Sleep Movement Tracking Multi-Function Ring High-Tech Pair Ring

Model: AS-JZ-188Battery Capacity: 18mAhExternal Dimensions: 7#17.3mm, 8#18.1mm, 9#18.9mm, 10#19.8mm, 11#20.6mmProduct Weight: 3.7gApplicable Population: UnisexWearing Method: FingerApplicable System: Android, iOSAdditional Functions: Sleep, Blood Oxygen, Step CountingCompatible Platform: iOS Bluetooth Version 5.2After-sales...