Overview

1. Full titanium body with recessed sensors for improved comfort and durability.
2. Smart Sensing™ platform adapts to your physiology with 18 signal paths increasing sensor accuracy.
3. Tracks advanced biometrics: heart rate, HRV, respiratory rate, SpO₂, skin temperature, and activity automatically.
4. Up to 8 days battery life and fast charging via redesigned metal dock.
5. Expanded sizing options—now available in sizes 4 to 15—for a better personalized fit.
6. Redesigned Oura App with Today, Vitals, and My Health tabs offering deeper insights and women’s health features like pregnancy & perimenopause tracking.

Specifications Overview

The Oura Ring Gen 4 is a premium wearable designed to deliver accurate, holistic health insights through a sleek, all-titanium smart ring. Featuring its revolutionary Smart Sensing™ technology, recessed sensors, and an extended battery life of up to 8 days, it offers sleep, recovery, and wellness tracking in a comfortable and durable form.

Specifications

Features

Width 7.9 mm

Thickness 2.88 mm

Specifications

Material Non‑allergenic titanium (inner & outer surfaces) with PVD Gold coating, seamless titanium interior

Battery Life Up to 8 days

Charge Time Typically between 20–80 minutes

Water Resistant Up to 100 m / 328 ft

Compatibility Oura App on iOS and Android, supports metric/imperial units, multiple languages, integrates with 40+ apps

Connectivity Bluetooth Low Energy, EMF-safe, allows Airplane Mode, FCC-certified, auto firmware updates via Oura App

Sensors Red and infrared LEDs for SpO₂, green and infrared LEDs for heart rate/HRV/respiration, digital temperature sensor, and accelerometer for movement/activity

Features Tracks sleep, 24/7 heart rate, heart rate variability (HRV), respiration, blood oxygen (SpO₂), body temperature, movement/activity, readiness/health scores, stress and recovery insights