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Top User RatedColmi R12 Smart Ring 22.4mm Waterproof with Heart Rate Monitor Black
Waterproof, Android & iOS, Pedometer
from35,05 € at 6 stores 
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Clear- Android: The smart ring connects to any Android phone.
- iOS: The smart ring connects to iPhone.
- Heat Rate Monitor: Monitors heartbeats per minute.
- Waterproof: Can be used for swimming in the sea or in a pool.
- Calorie Tracker: Calculates how many calories you have burned in a day.
- Pedometer: Calculates the total number of steps you have taken in a day.
- The estimated times provided by the manufacturers are indicative, as they vary depending on usage and enabled features.
- Wrap a thread around your finger, mark where it closes, measure its length in mm, and find the corresponding size (if you are between two sizes, choose the larger one). If you already wear a ring, measure its inner diameter.