Colmi Smartring R03 21.3MM 12 (Black)

Now you can access your most important information at your fingertips. The Colmi R03 smart ring provides convenient access to health and workout reports from the QRing app. What's more, it is resistant to water (5ATM), corrosion and wear and tear, so you can use it comfortably on a daily basis. The included case will allow you to safely store the ring and renew its energy. In addition, the lightweight (4.7g) design translates into comfort.