Watches with leather straps and quick release clasps Colmi - R10 Smart Ring Waterproof Fitness Tracker with Health Monitoring - Black

Size R10-7B (17.9mm) R10-8B (18.3mm) R10-9B (19.2mm) R10-10B (20mm) R10-11B (20.9mm) R10-12B (21.6mm) R10-13B (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