The Oura Ring Gen3 Heritage in size 9 - Silver is a high-quality heart rate monitor designed for unisex adults who engage in gym and training activities. With a sleek silver design and titanium material, this ring offers accurate heart rate measurements both indoors and outdoors. The display resolution of 240 x 240 provides clear visibility, while the battery life of up to 7 days ensures continuous monitoring. Compatible with Android operating systems and English language settings, this Oura Ring is a reliable fitness technology tool for tracking your heart rate during workouts.