--- product_id: 723998837 title: "OURA Ring 4 - Silver - Size 9 - Smart Ring | Size First Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life" brand: "oura" price: "€ 582.37" currency: EUR in_stock: true reviews_count: 11 category: "Oura" url: https://www.desertcart.be/products/723998837-oura-ring-4-silver-size-9-smart-ring-size-first store_origin: BE region: Belgium --- # Titanium durability 30+ biometric metrics 8 days battery life OURA Ring 4 - Silver - Size 9 - Smart Ring | Size First Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life **Brand:** oura **Price:** € 582.37 **Availability:** ✅ In Stock ## Summary > 💍 Own your health, silently and stylishly. ## Quick Answers - **What is this?** OURA Ring 4 - Silver - Size 9 - Smart Ring | Size First Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life by oura - **How much does it cost?** € 582.37 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/723998837-oura-ring-4-silver-size-9-smart-ring-size-first) ## 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 - • **Unplug & Go:** Up to 8 days of battery life means no daily charging—stay focused on life, not your device. - • **Data-Driven Wellness:** Track 30+ biometrics including heart rate, sleep, stress, and women’s health with Smart Sensing tech. - • **Seamless 24/7 Wearability:** Water-resistant and ergonomically designed for continuous wear, from workouts to nights out. - • **Precision Fit, Zero Guesswork:** Size yourself perfectly with the Oura Ring 4 Sizing Kit and enjoy a flawless fit every time. - • **Titanium Tough, Feather Light:** Crafted from full titanium for unmatched durability and all-day comfort, even for sensitive skin. ## Overview The Oura Ring 4 is a sleek, all-titanium smart ring designed for continuous health tracking with over 30 biometric sensors. It offers up to 8 days of battery life, water resistance, and a precision sizing kit to ensure the perfect fit. Paired with the Oura app and membership, it delivers personalized insights on sleep, activity, stress, heart, and women’s health, empowering professionals to optimize wellness discreetly and effortlessly. ## Description Product Description Size before you buy Easy to wear, everywhere No interruptions Built to last Accurate by design The Oura Ring 4 Sizing Kit is the best way to ensure an accurate experience. 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, water-resistant. Oura Ring 4 delivers incredibly accurate data and personalised health insights to help you be at your best. Fully Titanium Oura Ring 4 is fully titanium: one of the strongest metals on earth. Durable, lightweight, water resistant. Fully Titanium Oura Ring 4 is fully titanium: one of the strongest metals on earth. Durable, lightweight, water resistant. Smart Sensing A first-of-its-kind sensing platform, Smart Sensing adapts to your unique finger, ensuring continuous, accurate data from over 30 biometrics - day and night. Smart Sensing A first-of-its-kind sensing platform, Smart Sensing adapts to your unique finger, ensuring continuous, accurate data from over 30 biometrics - day and night. Long battery life Up to 8 days of battery means you can track your health 24/7 without charging every night. Long battery life Up to 8 days of battery means you can track your health 24/7 without charging every night. Always Wearable Oura Ring 4 is more comfortable with a fully round interior with discreet, recessed sensors. It's water resistant and can withstand heat, and cold. Always Wearable Oura Ring 4 is more comfortable with a fully round interior with discreet, recessed sensors. It's water resistant and can withstand heat, and cold. Sleep Activity Readiness Stress Heart Health Women’s Health Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel. Whether you’re 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. Size Before You Buy Step 1 Purchase an Oura Ring 4 Sizing Kit. Step 2 Purchase your Oura Ring 4. Step 3 Slip on your Oura Ring 4 and download the Oura App. Step 4 New members get the first month of Oura Membership free, then it’s ₹599 per month. Oura Ring 4 What's in the Box Oura Ring 4 Charger and USB-C Cable ## 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 999 INR desertcart credit towards the future purchase of an Oura Ring 4 - OURA MEMBERSHIP - First month of membership is free with your purchase, INR 599/mo afterwards. Offer available to new members only. Opt for annual prepaid option for INR 6999. 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 - WARRANTY: 2 year limited manufacturer warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D9WWB3WX | | Age Range Description | Adult | | Band Color | Silver | | Band Material Type | Titanium | | Battery Average Life | 5 Days | | Battery Capacity | 22 | | Battery Cell Composition | Lithium Polymer | | Battery Cell Type | Lithium Polymer | | Best Sellers Rank | #4,751 in Electronics ( See Top 100 in Electronics ) #5 in Rings | | Box Contents | Battery | | Brand Name | OURA | | Case Material Type | Titanium | | Closure Type | Slip On | | Colour | Silver | | Communication Feature | Bluetooth | | Compatible Devices | Smartphone | | Compatible Phone Models | All current smartphone models with iOS and Android operating systems | | Connectivity Technology | Bluetooth | | Controller Type | Ring | | Country of Origin | India | | Customer Reviews | 4.1 out of 5 stars 7,011 Reviews | | Display Type | No Display | | GPS Geotagging Functionality | No GPS | | Human Interface Input | Buttons | | Importer Contact Information | Rashi Peripherals Limited, A BLDG Survey 186 Dongripada, Poman Village Vasai Bhiwandi Road Palghar 401208 India. | | Item Dimensions | 26 x 26 x 7 Millimeters | | Item Type Name | Smart Ring | | Manufacturer | OURA, Oura Health OY Elektroniikkatie 10 Oulu Oulu 90590 Finland https://ouraring.com | | Manufacturer Contact Information | Oura Health OY Elektroniikkatie 10 Oulu Oulu 90590 Finland https://ouraring.com | | Metrics Measured | Heart Rate, Sleep Duration, Activity, Stress | | Model Name | Oura Ring 4 | | Model Number | JZ90-54217-09 | | Operating System | i_os, android | | Packer Contact Information | Oura Health OY Elektroniikkatie 10 Oulu Oulu 90590 Finland https://ouraring.com | | Product Features | Heart Rate Monitor, Activity Tracker | | RAM Memory Installed | 512 KB | | Shape | ring | | Special Feature | Heart Rate Monitor, Activity Tracker | | Style Name | Metallic | | Supported Application | Fitness Tracker | | Target Audience | Unisex Adult | | Unit Count | 1.00 Count | | Warranty Description | 2 years warranty | | Water Resistance Depth | 100 Metres | | Water Resistance Level | Water Resistant | | Waterproof Rating | IP68 | | Wearable Computer Type | Smart Ring | | Wireless Communication Standard | Bluetooth | | Wireless Compability | Bluetooth | ## Product Details - **Battery Cell Composition:** Lithium Polymer - **Connectivity Technology:** Bluetooth - **Operating System:** i_os, android - **Special Feature:** Heart Rate Monitor, Activity Tracker - **Wireless Communication Standard:** Bluetooth ## Images ![OURA Ring 4 - Silver - Size 9 - Smart Ring | Size First 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/61FTYzxTpoL.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 ### ⭐⭐⭐⭐⭐ Review *by D***Y on 4 April 2026* ### ⭐⭐⭐⭐⭐ Review *by X***Z on 2 April 2026* ### ⭐ Review *by S***L on 11 April 2026* ## Frequently Bought Together - Oura Ring 4 - Silver - Size 9 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life - sylacor Ring Cover for Oura Ring Gen 4/ Gen 3, Anti-Scratch Elastic Silicone Oura Ring Case Protector for Men Women Working Out Gym - 10 Pack Ring Cover Compatible with Oura Ring Gen 4/Oura Ring Gen 3 Horizon/Gen 3 Heritage, Surport Charging with Cover on, Anti-Scratch Elastic Silicone Ring Protector for Men Women Working Out Gym --- ## 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.be/products/723998837-oura-ring-4-silver-size-9-smart-ring-size-first](https://www.desertcart.be/products/723998837-oura-ring-4-silver-size-9-smart-ring-size-first) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-07*