R20 Ceramic Waterproof Smart Ring - Heart Rate/Blood Pressure/Blood Oxygen/Sleep/Sports Monitoring with NFC

Item No. :R20 Size :7 Inner diameter: 17.3mm Size:8, Inner diameter: 18.1mm Size: 9,Inner diameter: 18.9mm Size: 10,Inner diameter: 19.8mm Size: 11, Inner diameter: 20.6mm Size: 12, Inner diameter: 21.4mm Size:13,Inner diameter: 22.2mm Size: 14,Inner diameter: 23.4mm Model :R20 Applicable population: Adults Battery capacity :20mAh Product weight :27g Listing time :2025 Compatible platforms :ios, Android Additional features: sleep, blood oxygen, step count, distance, heart rate. Multiple motion modes Wearing method: Wear on your fingers Applicable systems: Android, IOS Packaging list: Ring, instruction manual, charging cable/charging case, packaging box Origin : Mainland China Important Notes: 1. Due to variations in lighting and screen calibration, the actual product color may appear slightly different from the images displayed. 2. As the measurements are taken manually, please allow for a tolerance of 0.1–0.3 cm.

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