viohead Smart Ring - Heart Rate Monitor IP68 Black

Smart Ring Health Fitness Tracker, Size First with Sizing Kit, Activity & Sleep Tracker/Stress/Heart Rate Monitor, Waterproof Smart Ring for Men/Women, No App Subscription  MULTIFUNCTION: - Pedometer: Steps, Calories, Distance - Heart Rate Monitor - Blood Pressure Monitor - Sleep Monitor - Sport Modes Compatibility: Smartphone iOS 5.0 or above, Android 10.0 or above Packing: - 1* Smart Ring - 1* User Manual - 1* USB Type-C Charging Case (without cable)