"Oura Ring Gen3 Horizon | Rose Gold SO-10887227" Description Each style has identical technical and hardware capabilities. Water resistant up to 100 m (more than 328 ft.) Lighter than a conventional ring (4 to 6 grams) Titanium: durable and wearable Includes size-specific charger and USB-C cable With daily wear, the ring may develop scratches Rose Gold will naturally darken over time, developing a beautiful patina Ring sensors should be on the palm side of your finger for the most accurate reading. To help ensure optimal positioning, Oura Horizon has a sleek, uninterrupted circular design with a pill-shaped dimple on the bottom, and Oura Heritage has a classic, plateau design with a flat surface on top.