---
product_id: 703964909
title: "OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible"
brand: "oura"
price: "€ 482.20"
currency: EUR
in_stock: true
category: "Oura"
url: https://www.desertcart.pt/products/703964909-oura-smart-ring-4-stealth-size-10-non-standard-fit
store_origin: PT
region: Portugal
---

# 8-day battery life Advanced sleep tracking 30+ biometric health metrics OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible

**Brand:** oura
**Price:** € 482.20
**Availability:** ✅ In Stock

## Summary

> 💍 Elevate your wellness game—wear the future on your finger.

## Quick Answers

- **What is this?** OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible by oura
- **How much does it cost?** € 482.20 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/703964909-oura-smart-ring-4-stealth-size-10-non-standard-fit)

## 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

- • **Tailored to You:** Available in multiple sizes and finishes with a precision size kit to ensure the perfect fit.
- • **Power Through Your Week:** Up to 8 days of battery life with fast 80-minute wireless charging keeps you connected longer.
- • **Seamless Smartphone Sync:** Effortlessly integrates with iOS and Android apps for real-time health analytics at your fingertips.
- • **Unlock Deep Health Intelligence:** Track heart rate, sleep quality, and over 30 biometrics for a holistic wellness snapshot.
- • **All-Day Comfort, All-Night Insight:** Sleek titanium design fits seamlessly into your lifestyle without weighing you down.

## Overview

The OURA Smart Ring 4 in Stealth is a minimalist, titanium wearable that delivers advanced health tracking with over 30 biometric sensors, including heart rate and sleep monitoring. It offers up to 8 days of battery life with quick wireless charging, pairs seamlessly with iOS and Android devices via Bluetooth, and comes with a precision sizing kit for a perfect fit. Water-resistant and backed by a 3-year warranty, it’s designed for professionals who demand both style and cutting-edge wellness insights.

## Description

Free delivery and returns on eligible orders. Buy OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible at desertcart UK.

## Features

- Compact and intelligent design for comfortable everyday wear
- Advanced health monitoring capabilities, including heart rate, sleep patterns, and activity tracking
- Long battery life with convenient wireless charging
- Seamless smartphone app integration for detailed health and activity analytics
- Available in multiple finishes and sizes for personalized style

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WVKWXN |
| Band Material Type | Titanium |
| Battery Average Life | 7 days |
| Battery Capacity | 144 Milliamp Hours |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | 564 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 2 in Wearable Tech Rings |
| Box Contents | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Brand Name | OURA |
| Closure Type | No Closure |
| Colour | Stealth |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | all current iPhone models, all current Android models |
| Connectivity Technology | Bluetooth |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 4.2 out of 5 stars (8,768) |
| Display Type | Analog |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Item Dimensions | 24 x 24 x 8 millimetres |
| Item Weight | 6.3 Ounces |
| Manufacturer | Oura |
| Memory Storage Capacity | 16 MB |
| Metrics Measured | Heart Rate Monitor, Sleep Monitor |
| Model Number | JZ90-54218-10 |
| Operating System | Android |
| Product Features | Advanced Health Tracking (Over 30 Biometrics) |
| Product Warranty | 3 year manufacturer warranty |
| Shape | Round |
| Style Name | Minimalist |
| Supported Application | Fitness Tracker |
| Supported Satellite Navigation System | GPS |
| Unit Count | 1.0 count |
| Warranty Type | Standard |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless Provider | Unlocked |

## Product Details

- **Battery capacity:** 144 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity technology:** Bluetooth
- **GPS:** No GPS
- **Memory storage capacity:** 16 MB
- **Operating system:** Android
- **Shape:** Round
- **Special feature:** Advanced Health Tracking (Over 30 Biometrics)
- **Wireless communication standard:** Bluetooth

## Images

![OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible - Image 1](https://m.media-amazon.com/images/I/418ROdi0vFL.jpg)
![OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible - Image 2](https://m.media-amazon.com/images/I/41tJsKzO2KL.jpg)
![OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible - Image 3](https://m.media-amazon.com/images/I/418msFWVsXL.jpg)
![OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible - Image 4](https://m.media-amazon.com/images/I/414AOMY+IfL.jpg)
![OURA Smart Ring 4 - Stealth - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS/Android Compatible - Image 5](https://m.media-amazon.com/images/I/41VAdbswOuL.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.

## Frequently Bought Together

- Oura Ring 4 - Stealth - Size 10 - 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 10 - Charging Dock and USB-C Cable - Charges Oura Ring 4 up to 8 Days
- 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

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**Shop now:** [https://www.desertcart.pt/products/703964909-oura-smart-ring-4-stealth-size-10-non-standard-fit](https://www.desertcart.pt/products/703964909-oura-smart-ring-4-stealth-size-10-non-standard-fit)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-23*