Oura Heritage Gen 2 Ring

Size 7, very gently worn Your sleep score answers, "how'd you sleep last night?" by analyzing your deep sleep, REM sleep, light sleep, nightly heart rate, bedtime schedule, and more. Go to ouraring.com to learn more Durable Titanium PVD Coating Non-Allergenic, Non-Metallic, Seamless Inner molding Water resistant up to 100m (more than 328 ft.) 4 to 7 days of battery life Full Charge in 20 to 80 minutes Weight & Dimensions: Width: 79mm Thickness: 2.55mm - Size of a Wedding Band Weight: 4 to 6 grams (depending on ring size) lighter than a conventional ring Connectivity: Bluetooth Low-Energy (Bluetooth Smart®) Automatic firmware updates via app