Modern design square dial watches Colmi - R10 Smart Ring Waterproof Fitness Tracker with Health Monitoring - Silver

Size R10-7S (17.9mm) R10-8S (18.3mm) R10-9S (19.2mm) R10-10S (20mm) R10-11S (20.9mm) R10-12S (21.6mm) R10-13S (22.4mm)
Qty:

CPU: RTL8762 ESF
Bluetooth: 5.0
Ring Battery: 17mAh
Capacity of Built-in Battery: 200mAh
Waterproof level: 5ATM
APP: "QRing"
Suitable for mobile phones with Android 5.1 or higher, or iOS 8.0 or higher.

Please view ring size chart image for size guidance