# Oura Ring 4 Ceramic Midnight Size 8 | Smart Health Tracking **Brand:** OURA **SKU:** ug8121 **ASIN:** B0FKQW8LTZ **Canonical URL:** https://crowcrowcrow.com/p/oura-ring-ceramic-midnight-size-sleep-activity-women-health-advisor-days-battery-life/ug8121 **Category:** electronics **Subcategory:** Wearable Technology **Availability:** in_stock **Price (INR, all-inclusive):** ₹56,829 **Discount:** 19% **Customer rating:** 4.40/5 from 10 ratings ## Description Oura Ring 4 Ceramic Midnight (Size 8) tracks sleep, activity, and health metrics with Smart Sensing. Lightweight, comfortable, and stylish, it offers up to 8 days battery life. FSA/HSA eligible. Arrives 14-16 days. ## Highlights - Comfortable 24/7 Wear — Lightweight and ergonomically designed with recessed sensors, you'll forget you're wearing it, even during sleep or workouts. - Up to 8 Days Battery Life — Focus on your health without constant charging. A single charge provides over a week of continuous tracking and insights. - Accurate Health Metrics — Smart Sensing technology tracks over 50 metrics including sleep stages, readiness, activity, and women's health for actionable insights. - Elegant Ceramic Design — The Midnight ceramic finish offers a sleek, modern look that complements any style, designed for everyday durability. ## Key features - 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 you — delivering accurate, continuous data, day and night - ACCURATE SIZING ESSENTIAL - Oura Ring 4 uses unique sizing different from standard jewelry rings; use the Oura Ring 4 Sizing Kit to find your perfect fit before purchasing - 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 - OURA MEMBERSHIP - First month of membership is included with purchase, for new members only. Subscription is 5.99/mo afterwards. Membership is tied to your account via the Oura App, not your physical ring - HSA/FSA ELIGIBLE - We can accept HSA or FSA funds for the following: Oura Ring, additional chargers, and shipping ## Why choose this product **Advanced Health Insights** — Oura Ring 4 Ceramic uses Smart Sensing to deliver accurate, continuous data on sleep, activity, stress, and more. This provides a comprehensive understanding of your body's readiness and recovery, helping you optimize your daily performance and well-being. The insights are presented through an intuitive app, making complex health data easy to interpret and act upon. Its design prioritizes comfort for all-day and all-night wear, ensuring you get a complete picture of your health without interruption. **Who It's For vs. Who Should Skip** — This ring is ideal for individuals seeking detailed, actionable health insights without the bulk of a smartwatch, especially those interested in sleep quality, recovery, and stress management. It's perfect for fashion-conscious buyers who want a discreet, elegant wearable. However, if you require real-time notifications or extensive app integrations like a smartwatch, this may not be the best fit. Those who are very rough with jewelry or engage in activities that could easily scratch metal objects should also exercise caution with the ceramic finish. ## How to use 1. Use the Oura Ring Sizing Kit to find your perfect fit before purchasing. Ensure the ring is snug but comfortable on your finger for accurate sensor readings. — Size Your Ring 2. Charge the ring using the included charger. Once charged, download the Oura App and follow the on-screen instructions to sync your ring and create your account. — Charge and Sync 3. Wear the ring 24/7, including during sleep and workouts. The recessed sensors should be on the palm side of your finger for optimal data collection. — Wear Continuously 4. Open the Oura App daily to review your sleep, activity, readiness, and other health metrics. Use these insights to understand your body and make informed lifestyle choices. — Review Insights ## Product details | Field | Value | |---|---| | Smart Sensing Technology | Proprietary sensor array | | Health Metrics Tracked | >50 (Sleep, Activity, Readiness, Stress, Heart Health, Women's Health) | | Allergens | Hypoallergenic materials | | Directions | Wear on finger, sync with Oura App. Use Oura Ring Sizing Kit before purchase for best fit. | | Frequency | Continuous tracking, sync daily | | Age Range | Adults | | Cost per use | ₹7,104 per day — 8-day battery life | | Shelf life after opening | 12 Months (typical for smart wearables) | | Reapplication math | One charge lasts up to 8 days. | | Contraindications | May not be suitable for those requiring constant smartwatch notifications or who are very rough with jewelry. | | Allergens / common irritants | Hypoallergenic materials used. | | Brand | Oura | | Model | JZ90-57455-08 | | Color | Midnight Ceramic | | Size | 8 (US) | | Material | Ceramic Exterior, Recessed Sensors | | Battery Life | Up to 8 days | | Compatibility | Android & iOS | | Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers | ## Attributes - **Unit count:** 1 ## Frequently asked questions ### How is this Oura Ring 4 authentic vs the version sold in Indian stores? This Oura Ring 4 Ceramic Midnight is sourced directly from authorized US retailers, factory-sealed, and imported per-order. It is the same SKU and formulation US buyers receive. All customs duties and GST are included in the displayed price. Delivery is via ExpressBox tracked shipping, arriving 14-16 days to your Indian pincode. ### Will the Oura Ring 4 Ceramic Midnight I receive match what is shown on the US retailer's page? Yes, orders are placed against the listed US retailer page at the time of purchase. Batch codes, packaging, and labels match what the US retailer dispatches. Photographs of every order are taken before international handover to ensure accuracy. ### Is the Oura Ring 4 Ceramic Midnight safe and healthy to wear? Yes, the Oura Ring 4 Ceramic is designed for comfortable, continuous wear. It uses recessed sensors and hypoallergenic materials. The health metrics tracked provide insights to support well-being, and it is not known to have adverse health side effects when used as intended. ### How do I choose the right size Oura Ring 4 Ceramic Midnight? Accurate sizing is essential for comfort and data accuracy. Oura Ring 4 uses unique sizing different from standard jewelry. It is highly recommended to use the Oura Ring 4 Sizing Kit to find your perfect fit before purchasing to ensure the best possible experience. ### How do I use the Oura Ring 4 Ceramic Midnight? Wear the ring on your finger, ensuring the sensors are on the palm side. Sync it daily with the Oura App on your smartphone. The app will guide you through setup and provide insights into your sleep, activity, and readiness. ### What is the best Oura Ring 4 Ceramic Midnight? The Oura Ring 4 Ceramic Midnight in Size 8 offers a blend of advanced health tracking, comfortable wear, and elegant design. It provides up to 8 days of battery life and detailed insights into sleep, activity, and women's health metrics. ### Can I use the Oura Ring 4 Ceramic Midnight daily? Yes, the Oura Ring 4 Ceramic is designed for continuous daily wear, including during sleep and workouts. Its lightweight, comfortable design and long battery life make it ideal for 24/7 use. ### What are the side effects of the Oura Ring 4 Ceramic Midnight? The Oura Ring 4 Ceramic is designed with hypoallergenic materials and recessed sensors for comfort. No significant side effects are reported when worn correctly. Some users note the need for careful handling of the ceramic finish to prevent scratches. ### What are the benefits of the Oura Ring 4 Ceramic Midnight? Benefits include accurate tracking of sleep, activity, readiness, and women's health metrics, providing actionable insights for improved well-being. Its comfortable, stylish design and long battery life make it a discreet yet powerful health companion. ## Compliance {"wearable_technology":"This device is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease. Always consult with a healthcare professional for any health concerns. Ensure correct sizing for optimal performance and comfort. Handle ceramic finish with care to prevent scratches."} ## Images 1. https://images.crowcrowcrow.com/B0FKQW8LTZ-0.webp 2. https://images.crowcrowcrow.com/B0FKQW8LTZ-1.webp 3. https://images.crowcrowcrow.com/B0FKQW8LTZ-2.webp 4. https://images.crowcrowcrow.com/B0FKQW8LTZ-3.webp 5. https://images.crowcrowcrow.com/B0FKQW8LTZ-4.webp 6. https://images.crowcrowcrow.com/B0FKQW8LTZ-5.webp --- Source: https://crowcrowcrow.com/p/oura-ring-ceramic-midnight-size-sleep-activity-women-health-advisor-days-battery-life/ug8121 Returns: 14 days, free pickup, full refund on genuine issues. Shipping: Free across India, 14-16 days. Prices are all-inclusive (duties + GST).