---
product_id: 661340293
title: "Ring 4 Smart Ring - Stealth - Size 10 | Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible"
brand: "oura"
price: "€ 684.39"
currency: EUR
in_stock: true
category: "Oura"
url: https://www.desertcart.fi/products/661340293-ring-4-smart-ring-stealth-size-10-sleep-activity-women
store_origin: FI
region: Finland
---

# 8-day battery life 100m water resistant 50+ health metrics tracked Ring 4 Smart Ring - Stealth - Size 10 | Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible

**Brand:** oura
**Price:** € 684.39
**Availability:** ✅ In Stock

## Summary

> 💍 Unlock your health’s hidden potential—wear the future on your finger.

## Quick Answers

- **What is this?** Ring 4 Smart Ring - Stealth - Size 10 | Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible by oura
- **How much does it cost?** € 684.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/661340293-ring-4-smart-ring-stealth-size-10-sleep-activity-women)

## 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

- • **Stay Powered Longer:** Up to 8 days of battery life means less charging, more living—track your health uninterrupted.
- • **Seamless Style Switch:** Multi-ring support lets you swap finishes via the app to match your mood or outfit instantly.
- • **Effortless All-Day Wear:** Sleek, lightweight titanium design with no screen or vibrations keeps you focused and stylish.
- • **Precision Meets Adaptability:** Smart Sensing technology delivers personalized, continuous health insights tailored to you.
- • **Health Data at Your Fingertips:** Monitor sleep, heart rate, stress, activity, and women’s health metrics all in one discreet ring.

## Overview

The Oura Ring 4 Smart Ring in Stealth (Size 10) is a cutting-edge biometric wearable crafted from titanium, designed to track over 50 health metrics including sleep, heart rate, stress, and women’s health. Featuring Smart Sensing technology, it adapts to your body for precise, continuous monitoring. With up to 8 days of battery life, 100-meter water resistance, and seamless Bluetooth connectivity, it offers a stylish, low-profile way to stay on top of your wellness. Multi-ring support and an included membership enhance personalization and insights, making it a must-have for health-conscious professionals.

## Description

Introducing Oura Ring 4: the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most — your health. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn’t just measure your biometrics, it adapts to you, providing insights into over 50 health metrics including sleep, readiness, activity, heart health, stress, metabolic health, and women’s health. Oura Ring quietly and comfortably monitors your health and with 5 to 8 days of battery life — you can forget it’s even on. With multi-ring support, change Oura Ring 4 styles as easily as changing your outfit. If you have two or more Oura Ring 4 styles, you can now switch easily between different finishes in the Oura App.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WVKWXN |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Band Material Type | Titanium |
| Battery Average Life | 5 days |
| Battery Capacity | 19 |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | #246 in Electronics ( See Top 100 in Electronics ) #3 in Smart Rings |
| Brand | OURA |
| Built-In Media | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
| Cellular Technology | Not Supported |
| Closure Type | No Closure |
| Color | Stealth |
| Communication Feature | Bluetooth, GPS |
| Compatible Devices | Smartphone |
| Compatible Phone Models | all current iPhone models, all current Android models |
| Connectivity Technology | Bluetooth |
| Customer Reviews | 4.0 4.0 out of 5 stars (9,012) |
| Display Type | No Display |
| GPS Geotagging Functionality | GPS Via Smartphone |
| Human Interface Input | Touchscreen |
| Item Dimensions | 0.94 x 0.94 x 0.31 inches |
| Item Weight | 6.3 ounces |
| Manufacturer | Oura |
| Memory Storage Capacity | 16 MB |
| Metrics Measured | Body Temperature, Heart Rate, Menstrual Cycle, Sleep Duration |
| Model Number | JZ90-54218-10 |
| Operating System | Android, iOS |
| RAM Memory Installed | 16 MB |
| Shape | Round |
| Style Name | Metallic |
| Supported Application | Fitness Tracker, Sleep Monitor, Voice Control, Time Display, Messages, Social Media, Heart Rate Monitor, Pedometer, Reminders, Weather, Calendar, Music Player |
| Supported Satellite Navigation System | GPS |
| Unit Count | 1 Count |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Limited |
| Water Resistance Depth | 100 meters |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless Provider | Unlocked |

## Product Details

- **Battery Capacity:** 19
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity Technology:** Bluetooth
- **GPS:** GPS Via Smartphone
- **Memory Storage Capacity:** 16 MB
- **Operating System:** Android, iOS
- **Shape:** Round
- **Special Feature:** Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight
- **Wireless Communication Standard:** Bluetooth

## Images

![Ring 4 Smart Ring - Stealth - Size 10 | Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible - Image 1](https://m.media-amazon.com/images/I/51-7ivDG+6L.jpg)

## Available Options

This product comes in different **Color, Size, Style** 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.fi/products/661340293-ring-4-smart-ring-stealth-size-10-sleep-activity-women](https://www.desertcart.fi/products/661340293-ring-4-smart-ring-stealth-size-10-sleep-activity-women)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-08-24*