The Smart Ring W8 is a sleek and innovative device designed for monitoring your heart rate, blood pressure, and oxygen levels while you sleep. Its waterproof feature allows you to wear it during workouts, making it perfect for those looking to track their health and fitness. The black colour and UK Size U make it a stylish and comfortable accessory that can be worn all day long. With its advanced technology and user-friendly design, the Smart Ring W8 is the perfect tool for anyone looking to take charge of their health and well-being. Inside Diameter 19.8mm Circumference 62.1mm
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