The Colmi R02 smart ring is an innovative wearable device that aims to support the health and fitness of its users. Weighing just 4.4 g, the ring is comfortable to wear and is equipped with a variety of functions that enable comprehensive monitoring of physical activity. It measures heart rate, sleep quality and blood oxygen saturation and counts steps and calories burnt. The smart ring is designed for active lifestyles and offers 21 different sports modes to support individual fitness goals. Thanks to its IP68 water resistance, it is also suitable for use in various weather conditions. The collected data can be conveniently accessed via the QRing app, which enables detailed analysis of health and fitness data. With a battery life of up to 6 days on a single charge, the smart ring is a reliable companion for everyday use.