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Oura Ring sizes are different than standard sizing.

Because Oura Ring sizes are slightly different than U.S. and Canadian standard sizes, it's important to find your correct size. We recommend using the in-store Oura Ring Sizing Kit or ordering a sizing kit online.

Shop sizing kit
Oura Ring 4 Sleep & Fitness Smart Ring - Black - Size 8
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Oura Ring 4 Sleep & Fitness Smart Ring - Black - Size 8

Brand: Oura
Model: JZ90-54144-08
Web Code: 18390670
Sold and shipped by Best Buy

What you need to know:

  1. Membership is $19.99 / month until you cancel.
  2. You can cancel at any time, but if you cancel after the first 30 days you may be subject to a service recovery fee.
See full Terms and Conditions

Available for preorder

Release Date: October 15, 2024

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Replacements made easy.¹

Best Buy Protection Replacement Plan covers replacement costs without any deductibles or hidden fees. If your product is found defective under normal usage, you’ll get a gift card for the original purchase price, including taxes.

You can easily request a replacement gift card anytime by making a Service Request online.

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Overview

Oura Ring 4 brings you closer to what matters most — your health. With an updated all-titanium design, this smart ring features Smart Sensing, a new sensing platform that doesn’t just measure your biometrics but also adapts to you. It provides insights into over 30 biometrics including sleep, readiness, activity, heart health, stress, and women’s health.
GeneralInterface-Warranty

Manufacturer's Warranty

Check with the manufacturer for details or purchase Best Buy Protection on the next step.

Return Policy

30 days to return or exchange

Read return policy

What's included:

  • Oura Ring
  • Oura Ring Charger
  • Oura Ring Charging Cable
  • Oura tracks over 30 biometrics, including sleep, activity, stress, heart health, and women’s health metrics. Oura Ring 4 is powered by Smart Sensing, which adapts to your unique finger and activity — delivering accurate, continuous data, day and night
  • With up to eight days of battery life, no screens and no vibrations, Oura Ring 4 allows you to focus on the present. From a workout to a night out — you’re free to forget it’s on. Until you start getting compliments
  • It's designed For 24/7 Wear. The updated design is more comfortable, fits better than ever, and is water resistant. The first all-titanium smart ring combines exceptional durability with a gentle touch, even for sensitive skin. Note: All battery claims depend on Oura Ring size, Oura App settings, feature configuration, activity, age of battery, usage, and many other factors; actual results will vary. Battery life and charge cycles vary by use and settings. Battery tests were conducted across various sizes and scenarios. See Ring Battery tips for more information
  • Get the best sleep of your life, and then some. Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel. Oura provides insights into your sleep staging throughout the night, blood oxygen levels, HRV and nighttime heart rate
  • Know when to push it and when to take it easy with the Oura Readiness Score. It takes into consideration over 30 different body signals — including temperature, heart rate, HRV, and sleep — to tell you how ready you are for the day ahead
  • Whether you're running a marathon or running errands, Oura tracks your daily activity, steps, calories burned and workouts while helping you strike a balance between movement and recovery
  • From monitoring your daily heart rate and HRV to discovering your Cardiovascular Age and Cardio Capacity, Oura helps you take care of one of key indicators of your overall health — your heart
  • Women’s Health: Your cycle impacts your mood, sleep, activity and more, every day. Oura helps you understand how your cycle affects your body, so you can make better, informed decisions about your holistic health. Track the changes in your body throughout your cycle and predict your period up to 30 days in advance
  • Oura will help you identify signs of stress and understand how well your body handles it. You'll know when you need to incorporate more self-care practices and how to recover from long term stressors
  • Stress Resilience visualizes how well your body withstands stress over time and helps you build resilience to get through life’s challenges. A healthy amount of stress, sleep, and recovery keeps you prepared for whatever comes your way
  • Automatically sync your health and workout data from your favourite apps through Apple Health, Google Fit, Health Connect, Strava, and Natural Cycles
  • Get your Oura data at a glance from your iPhone or Apple Watch with iOS widgets and Apple Watch complications. You can also access a companion version of the Oura App on your Apple Watch
  • Oura App is compatible on Android devices running Android 8.0 and higher with Google Play services. The device must also support Bluetooth 4.0
  • iOS and Android apps available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Danish, and Swedish. Supports metric and imperial units of measurement
  • First month of membership is included with your purchase. Offer available to new members only. Monthly membership fee may be required after the first month
  • Add the Oura Ring 4 Sizing Kit (available separately)
Product Condition
Brand New
Band Colour
Black
Band Material
Titanium
Ring Size
8
GPS
Yes
Heart Rate Monitor
Yes

Compatibility

Smartphone Compatibility
Yes
Android Compatibility
Yes

Power

Battery Life (Typical)
8 d
Charging Time
1 h

Features

Water Resistance
Yes
Dust Proof
Yes

Health Tracking Features

Biometrics Tracked
Blood Oxygen Levels
Blood Oxygen Monitoring
Yes
Sleep Tracking
Yes
Women's Health
Yes
Body Temperature
Yes
Perspiration
No
Guided Breathing
Yes
Guided Meditation
Yes
Fall Detection
No

Activity Monitoring Features

Goal Setting
Automatic
Calories Tracking
No
Steps Tracking
Yes
Distance Tracking
Yes
Running Tracking
Yes
Elevation Tracking
No
Number Of Sensors
18

Sensors

Smart Phone Synchronization
Yes
Data Syncing
Yes
Wireless Syncing
Yes
Real Time Data Syncing
Yes

Notifications & Controls

Incoming Calls
No
Missed Calls
No
Answering Calls
No
Emergency Calling
No

Dimensions

Width
0.79 cm
Depth
0.29 cm
Height
1.48 cm
Weight
3.3 g

What you need to know:

  1. Membership is $19.99 / month until you cancel.
  2. You can cancel at any time, but if you cancel after the first 30 days you may be subject to a service recovery fee.
See full Terms and Conditions