--- product_id: 718989678 title: "Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life" brand: "oura" price: "$521.19" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.us/products/718989678-ring-4-smart-ring-size-first-with-oura-ring-4 store_origin: US region: United States of America --- # 8 days battery life 100m water resistant titanium 30+ biometrics tracked Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life **Brand:** oura **Price:** $521.19 **Availability:** ✅ In Stock ## Summary > 💍 Own your health, invisibly powerful. ## Quick Answers - **What is this?** Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life by oura - **How much does it cost?** $521.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/718989678-ring-4-smart-ring-size-first-with-oura-ring-4) ## Best For - oura enthusiasts ## Why This Product - Trusted oura brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Data-Driven Wellness:** Track 30+ biometrics including heart rate, sleep, stress, and women’s health for personalized insights that elevate your daily performance. - • **Discreet Smart Health:** No screens, no buzz—just pure, continuous health tracking that lets you stay present while Oura works silently in the background. - • **Effortless 8-Day Power:** Stay unplugged and unstoppable with a week-plus battery life that keeps pace with your busiest days and wildest nights. - • **Seamless Sizing Experience:** Get the perfect fit first time with the Oura Ring 4 Sizing Kit—because precision matters when optimizing your health journey. - • **Titanium Tough, Feather Light:** Crafted from aerospace-grade titanium for unmatched durability and comfort—wear it 24/7, rain or shine, workout or soirée. ## Overview The Oura Ring 4 is a sleek, all-titanium smart ring designed for 24/7 wear, offering up to 8 days of battery life and water resistance up to 100 meters. It tracks over 30 biometrics including sleep, heart rate, stress, and women’s health metrics with advanced Smart Sensing technology. The ring pairs seamlessly with the Oura App, providing personalized health insights without distracting notifications. The sizing kit ensures a perfect fit, making it the ultimate wearable for professionals seeking discreet, data-driven wellness. ## Description The Oura Ring 4 Sizing Kit is the best way to ensure an accurate experience. With a purchase of the sizing kit, you'll receive a credit towards your Oura Ring 4. Sleek and comfortable, Oura Ring seamlessly fits into your life from a workout to a night out. Stay present without notifications on your wrist. Check the Oura App when you want to. Oura Ring 4 is fully titanium: one of the strongest metals on earth. Durable, lightweight, and water resistant. Oura Ring 4 delivers incredibly accurate data and personalised health insights to help you be at your best. Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel. Whether running a marathon or running errands, Oura tracks your daily activity and workouts while helping you strike a balance between movement and recovery. Know when to push it and when to take it easy. Your Readiness Score tells you how energised you are using over 30 biometrics - it can even tell when you might be getting sick. 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 practises and how to recover from long term stressors. 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. 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. Purchase an Oura Ring 4 Sizing Kit and receive a credit towards your Oura Ring. Advanced health monitoring capabilities, including heart rate, sleep patterns, and activity tracking. Slip on your Oura Ring 4 and download the Oura App. New members get the first month of Oura Membership free. ## Features - SIZE BEFORE YOU BUY - Oura Ring 4 sizes are different from standard ring sizes. Size yourself with the Oura Ring 4 Sizing Kit and receive a dh35.00 desertcart credit towards the future purchase of an Oura Ring 4. - OURA MEMBERSHIP - First month of membership is free with your purchase, $6.99/mo afterwards. Offer available to new members only. Or opt for the annual prepaid option for $79.99. Membership is tied to your account via the Oura App, not your physical ring. - ACCURACY - SMART SENSING - 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 you — delivering accurate, continuous data, day and night. - LONG LASTING 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 the 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. ## Technical Specifications | Specification | Value | |---------------|-------| | Additional Features | Activity Tracker | | Age Range Description | Adult | | Asin | B0D9WVW5XB | | Band Color | Stealth | | Band Material Type | Titanium | | Battery Average Life | 8 days | | Battery Cell Type | Lithium Polymer | | Battery Charge Time | 80 minutes | | Best Sellers Rank | #353 in Electronics (See Top 100 in Electronics) #3 in Wearable Tech Rings | | Brand | OURA | | Built In Media | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable | | Case Material Type | Titanium | | Clasp Type | No Clasp (Fixed Size) | | Closure Type | Continuous Band | | Color | Stealth | | Communication Feature | Bluetooth | | Compatible Devices | Smartphone, Tablet | | Compatible Phone Models | Compatible with iOS and Android devices | | Connectivity Technology | Bluetooth, USB | | Controller Type | Gesture Recognition | | Country Of Origin | Estonia | | Customer Reviews | 4.0 4.0 out of 5 stars (8,066) 4.0 out of 5 stars | | Display Type | No Display | | Global Trade Identification Number | 06430060153561 | | Gps Geotagging Functionality | No GPS | | Human Interface Input | Buttons | | Item Dimensions | 26 x 26 x 8 millimeters | | Item Dimensions D X W X H | 26D x 26W x 8H millimeters | | Item Weight | 0.18 Kilograms | | Manufacturer | Oura | | Metrics Measured | Blood Oxygen (SpO2), Heart Rate, Sleep Duration, Stress | | Model Name | Oura Ring 4 - Stealth - Size 12 | | Model Number | JZ90-54218-12 | | Operating System | Android | | Shape | Round | | Style Name | Minimalist | | Supported Application | Fitness Tracker | | Supported Satellite Navigation System | GPS | | Target Audience | Unisex Adults | | Warranty Description | 2 year manufacturer warranty | | Warranty Type | Limited | | Water Resistance Depth | 100 Meters | | Water Resistance Level | Water Resistant | | Wearable Computer Type | Smart Ring | | Wireless Compability | Bluetooth | ## Product Details - **Battery cell composition:** Lithium Polymer - **Connectivity technology:** Bluetooth, USB - **Operating system:** Android - **Special features:** Activity Tracker - **Wireless communication standard:** Bluetooth ## Images ![Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life - Image 1](https://m.media-amazon.com/images/I/51-7ivDG+6L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: How long should my ring work between charges?** A: Oura Ring 4 typically lasts 5-8 days on a full charge, depending on usage. Contact Oura Member Care if you have questions or concerns with battery life, and they will ensure your problem is resolved **Q: How do I choose the right Oura Ring size?** A: Using the Oura Ring 4 Sizing Kit, choose a finger for your ring. We recommend the index, middle or ring finger. Wear the sizer ring for 24 hours to ensure the fit is secure and comfortable over the course of your day. **Q: What's included?** A: Oura Ring 4, Oura Ring 4 Charger, and USB-C Cable. **Q: How do I see my Oura Ring metrics?** A: After activating your Oura Ring, you can choose a monthly or annual membership to unlock full access to Oura’s features, daily health and wellness metrics, and personalized guidance. **Q: Can I use more than one ring?** A: Oura Members can now connect more than one Oura Ring 4 to their Oura App and quickly switch between them. Note, this feature only supports wearing and syncing data from one active Oura Ring at a time. ## Customer Reviews ### ⭐⭐⭐⭐⭐ New Ring *by on Reviewed in the United Arab Emirates 27 May 2026* My Oura Ring arrived in perfect condition, the box was closed and the ring is new, was very easy to create and account in the app, I got one month free subscription as advertised, I was so worry about the reviews and at the end everything works great. Love the ring colour. ### ⭐⭐⭐⭐⭐ Pricey and good quality *by on Reviewed in the United Arab Emirates 23 November 2025* No wonder it is priced very high but it delivers the quality justifying the price tag ### ⭐ WOULD NOT RECOMMEND *by on Reviewed in the United Arab Emirates 28 April 2026* After just 6 months, the battery lasts only 1 day. The ring frequently loses connection and fails to record data, especially during sleep. Very disappointing experience — would not recommend. ## Frequently Bought Together - Oura Ring 4 - Stealth - Size 12 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life - Oura Ring 4 Charger - Size 12 - Charging Dock and USB-C Cable - Charges Oura Ring 4 up to 8 Days --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/718989678-ring-4-smart-ring-size-first-with-oura-ring-4](https://www.desertcart.us/products/718989678-ring-4-smart-ring-size-first-with-oura-ring-4) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-29*