Overview

  • Oura Membership
    First month of membership is on us with your purchase, $5.99/mo afterwards. Offer available to new members only. Take advantage of the annual prepaid option for $69.99. Membership is tied to your account accessible via the Oura App, not your physical ring.
  • Size Before You Buy
    Order an Oura Ring 4 Sizing Kit, or visit a Best Buy store, to find your optimal size, then return to BestBuy.com to buy your Oura Ring 4.
  • Accuracy – Smart Sensing
    Oura tracks over 50 health metrics, 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.
  • Battery
    With up to 8 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.
  • Designed For 24/7 Wear
    The updated design of Oura Ring 4 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.
  • Sleep
    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.
  • Readiness
    Know when to push it and when to take it easy with the Oura Readiness Score. It takes into consideration over 50 different health metrics — including temperature, heart rate, HRV, and sleep — to tell you how ready you are for the day ahead.
  • Activity
    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.
  • Heart Health
    From monitoring your daily heart rate and HRV to discovering your Cardiovascular Age and Cardio Capacity, Oura helps you take care of one of the 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.
  • Stress
    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.
  • Metabolic
    Learn how to fuel your wellbeing. See a nutritional breakdown of your meals, understand your meal timing and understand how what you eat impacts your holistic health.
  • Oura Advisor
    Oura Advisor is an AI-powered health coach to help you understand your body and your biometrics. Use it as a sounding board to help guide you towards healthy habits, make nutritional decisions and answer questions you might have about your data.
  • Mutli-Ring Support
    Change Oura Ring 4 styles as easily as changing your outfit. If you have two or more Oura Ring 4 styles, you can now switch easily between different finishes in the Oura App.
  • HSA/FSA Compatibility
    You may be eligible for reimbursement on your Oura Ring purchase. You can submit your Best Buy confirmation email to your FSA or HSA provider as proof of purchase.
  • App Compatibility
    Automatically sync your health and workout data from your favorite apps through Apple Health, Google Fit, Health Connect, Strava, and Natural Cycles.
  • iPhone and Apple Watch Compatibility
    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.
  • Android Compatibility
    The award-winning 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.
  • Language Availability
    iOS and Android apps available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Danish, and Swedish. Supports metric and imperial units of measurement.

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Specifications

Dimensions & weight

Product Name
Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 6
Maximum Depth of Water Resistance
328 feet
Product Height
0.6 inches
Product Width
7.9 inches
Product Weight
3.6 ounces
Product Length
2.88 inches
Product Type
Activity tracker

Features

Ring Size
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
Color
Black, Stealth, Brushed Silver, Gold, Silver, Rose Gold
Brand
Oura
Ring Size System
US
Display Screen
No
Operating System Compatibility
Apple iOS
Wireless Connectivity
Bluetooth
Built-in Storage
0 gigabytes
GPS Enabled
No
Metrics Measured
Activity vs. inactivity
Protective Qualities
Water resistant
Rechargeable
Yes
Charging Interface(s)
Wireless
Band Material
Titanium
Form Factor
Ring
Year of Release
2024
UPC
6430060153141, 6430060153127, 6430060153486, 6430060153721, 6430060153264, 6430060153387, 6430060153509, 6430060155978, 6430060156098, 6430060153271, 6430060153394, 6430060153516, 6430060156104, 6430060155985, 6430060153165, 6430060153288, 6430060153400, 6430060153523, 6430060153646, 6430060155992, 6430060156111, 6430060156357, 6430060153295, 6430060153417, 6430060153530, 6430060156005, 6430060156128, 6430060155886, 6430060156364, 6430060153301, 6430060153424, 6430060153547, 6430060156135, 6430060155893, 6430060156012, 6430060156258, 6430060156494, 6430060153318, 6430060153431, 6430060153554, 6430060156142, 6430060156500, 6430060156265, 6430060153325, 6430060153448, 6430060153561, 6430060156272, 6430060153219, 6430060153332, 6430060153455, 6430060153578, 6430060153707

Power & warranty

Model Number
JZ90-54144-06
Model Family
Oura Ring 4
Warranty - Parts
1 year
Warranty - Labor
1 year

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

Customer reviews

Write a review
RONYSNov 6, 2026 · Verified purchase ★★★★★

Wow !!! - Gave it to my wife as an early Xmas gift and it was a hit!! Very easy to use, wear, charge and looks great on your hand. It tracks everything she needs and more, she tells me every morning about her sleep cycle over coffee lol. Will definitely get one for me soon.

LoyalBestBuyCustomerNov 6, 2026 · Verified purchase ★★★★★

Oura Ring - This ring lives up to the hype. Convenient to have, especially when I don’t want to wear my smart watch.

CINTHIASNov 4, 2026 · Verified purchase ★★★★★

Oura Ring - Great for tracking sleep and daily habits! The Oura Ring is comfortable, stylish, and easy to wear throughout the day and night. I like being able to see my sleep patterns and activity in one app. It helps me pay more attention to my daily habits. Overall, I’m happy with my purchase!

HALEYTNov 3, 2026 · Verified purchase ★★★★★

Accurate heart rate tracking - I was really impressed by the sleep tracking and how accurate the heart rate monitoring waz

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat