---
product_id: 722783734
title: "Oura Smart Ring 4 - Stealth - Size 12 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible"
brand: "oura"
price: "€ 587.39"
currency: EUR
in_stock: true
category: "Oura"
url: https://www.desertcart.fr/products/722783734-oura-smart-ring-4-stealth-size-12-non-standard-fit
store_origin: FR
region: France
---

# 8-day battery life Continuous heart rate monitoring Advanced sleep tracking Oura Smart Ring 4 - Stealth - Size 12 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible

**Brand:** oura
**Price:** € 587.39
**Availability:** ✅ In Stock

## Summary

> 💍 Own your health, stealthily and stylishly.

## Quick Answers

- **What is this?** Oura Smart Ring 4 - Stealth - Size 12 - | 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?** € 587.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/722783734-oura-smart-ring-4-stealth-size-12-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

- • **Waterproof & Ready:** 100m water resistance means your ring keeps up with every workout and adventure.
- • **Effortless All-Day Wear:** Sleek titanium design ensures comfort and durability for your busiest days.
- • **Power Through Your Week:** Up to 8 days of battery life with fast 80-minute wireless charging keeps you connected longer.
- • **Seamless Smartphone Sync:** Bluetooth-enabled app integration delivers real-time analytics on iOS and Android.
- • **Next-Level Health Insights:** Track sleep, heart rate, activity, and stress with clinical-grade precision.

## Overview

The Oura Smart Ring 4 in Stealth is a minimalist titanium wearable that offers advanced biometric tracking including heart rate, sleep, and activity monitoring. With an impressive 8-day battery life, fast wireless charging, and seamless Bluetooth connectivity to iOS and Android devices, it delivers detailed health insights in a compact, water-resistant design. Perfect for professionals seeking discreet, data-driven wellness.

## Description

Free delivery and returns on eligible orders. Buy Oura Smart Ring 4 - Stealth - Size 12 - | 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 | B0D9WVW5XB |
| Age Range Description | Adult |
| Band Material Type | Titanium |
| Battery Average Life | 8 days |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | 635 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 3 in Wearable Tech Rings |
| Box Contents | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Brand Name | OURA |
| Case Material Type | Titanium |
| Clasp Type | No Clasp (Fixed Size) |
| Closure Type | Buckle |
| Colour | Stealth |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Connectivity Technology | Bluetooth, USB |
| Controller Type | Gesture Recognition |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 4.2 out of 5 stars (8,983) |
| Display Type | Without display |
| GPS Geotagging Functionality | No GPS |
| Global Trade Identification Number | 06430060153561 |
| Human Interface Input | Buttons |
| Item Dimensions | 26 x 26 x 8 millimetres |
| Item Dimensions D x W x H | 8D x 26W x 8H millimetres |
| Item Weight | 0.18 Kilograms |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate Monitor, Sleep Duration, Distance, Step Count, Calories Burned, Stress |
| Model Name | Oura Ring 4 - Stealth - Size 12 |
| Model Number | JZ90-54218-12 |
| Operating System | Android |
| Product Features | Sleep Monitor |
| Product Warranty | 3 year manufacturer warranty |
| Shape | Rund |
| Style Name | Minimalist |
| Supported Application | Fitness Tracker |
| Supported Satellite Navigation System | GPS |
| Target Audience | Uni-Erwachsene |
| Warranty Type | Lifetime |
| Water Resistance Depth | 100 Metres |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |

## Product Details

- **Battery cell composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity technology:** Bluetooth, USB
- **GPS:** No GPS
- **Model name:** Oura Ring 4 - Stealth - Size 12
- **Operating system:** Android
- **Shape:** Rund
- **Special feature:** Sleep Monitor
- **Style:** Minimalist
- **Wireless communication standard:** Bluetooth

## Images

![Oura Smart Ring 4 - Stealth - Size 12 - | 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 12 - | 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 12 - | 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 12 - | 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 12 - | 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 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

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**Shop now:** [https://www.desertcart.fr/products/722783734-oura-smart-ring-4-stealth-size-12-non-standard-fit](https://www.desertcart.fr/products/722783734-oura-smart-ring-4-stealth-size-12-non-standard-fit)

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-10-17*