ERICAT Smart Health Ring - 16mm 18mm 20mm

This smart ring is a meaningful gift. It is suitable for any occasion or holiday such as birthday, anniversary, Thanksgiving, Christmas or Valentine's Day. Specification: System requirements: Android: 6.0 or above; iOS: 11.0 or above Battery: 23mAh Charging box Capacity: 400mAh Charging time (hours): 1 ± 0.5 Size: 16mm/18mm/20mm Package Includes: Smart Ring*1 Charging Compartment*1 Charging Cable*1 Notes: This product has 3 sizes to choose from, please confirm the size that suits you before purchasing. Please allow the slight color difference caused by the shooting light and 1-3 cm error due to manual measurement.