---
product_id: 706499391
title: "Oura Smart Ring 4 - Stealth - Size 9 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible"
brand: "oura"
price: "2673 Lei"
currency: RON
in_stock: true
category: "Oura"
url: https://www.desertcart.ro/products/706499391-oura-smart-ring-4-stealth-size-9-non-standard-fit
store_origin: RO
region: Romania
---

# Titanium durability Advanced health metrics 8-day battery life Oura Smart Ring 4 - Stealth - Size 9 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible

**Brand:** oura
**Price:** 2673 Lei
**Availability:** ✅ In Stock

## Summary

> 💍 Own your health in stealth mode — style meets science.

## Quick Answers

- **What is this?** Oura Smart Ring 4 - Stealth - Size 9 - | 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?** 2673 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/706499391-oura-smart-ring-4-stealth-size-9-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

- • **8-Day Powerhouse:** Uninterrupted tracking with a long-lasting battery and quick 80-minute USB-C wireless charging.
- • **Sleek Titanium Build:** Durable, lightweight, and stylish for all-day comfort and subtle sophistication.
- • **Seamless Smartphone Sync:** Effortlessly integrates with iOS and Android via Bluetooth for real-time data and personalized coaching.
- • **Custom Fit with Sizing Kit:** Perfect fit guaranteed—measure before you buy to ensure your ring feels like it was made just for you.
- • **Comprehensive Health Insights:** Track heart rate, sleep quality, activity, and women’s health with AI-driven analytics.

## Overview

The Oura Smart Ring 4 in Stealth combines cutting-edge biometric tracking with a sleek titanium design, offering up to 8 days of battery life and seamless Bluetooth connectivity to iOS and Android devices. It delivers precise insights into sleep, heart rate, activity, and women’s health, all wrapped in a discreet, comfortable wearable that fits perfectly thanks to its included sizing kit.

## Description

Free delivery and returns on eligible orders. Buy Oura Smart Ring 4 - Stealth - Size 9 - | 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 | B0D9WVKRKS |
| Age Range Description | Adult |
| Band Material Type | Titanium |
| Battery Average Life | 8 days |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Battery cell composition | Lithium Polymer |
| Best Sellers Rank | 447 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 |
| Case Material Type | Titanium |
| Closure Type | Buckle |
| Colour | Stealth |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Connectivity Technology | Bluetooth |
| Connectivity technology | Bluetooth |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 out of 5 stars 8,661 Reviews |
| Display Type | No Display |
| EU Spare Part Availability Duration | 8 Days |
| GPS | No GPS |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Item Dimensions | 23 x 23 x 8 millimetres |
| Item Dimensions D x W x H | 8D x 23W x 8H millimetres |
| Item Weight | 0.18 Kilograms |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate Monitor |
| Model Name | Oura Ring 4 - Stealth - Size 9 |
| Model Number | JZ90-54218-09 |
| Operating System | Sistema Operativo Proprietario |
| Operating system | Sistema Operativo Proprietario |
| Product Features | Sizing Kit |
| Product Warranty | 3 year manufacturer warranty |
| Shape | Round |
| Special feature | Sizing Kit |
| Style Name | Metallic |
| Supported Application | Oura App |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adults |
| Unit Count | 1.0 count |
| Warranty Type | Lifetime |
| Water Resistance Depth | 100 Metres |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless Provider | Verizon |
| Wireless communication standard | Bluetooth |

## Product Details

- **Special feature:** Sizing Kit
- **Connectivity technology:** Bluetooth
- **Wireless communication standard:** Bluetooth
- **Battery cell composition:** Lithium Polymer
- **GPS:** No GPS
- **Shape:** Round
- **Brand:** OURA
- **Style:** Minimalist
- **Colour:** Stealth
- **Age range (description):** Adult

## Images

![Oura Smart Ring 4 - Stealth - Size 9 - | 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/51NatpBotdL.jpg)
![Oura Smart Ring 4 - Stealth - Size 9 - | 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/51GryhzriFL.jpg)
![Oura Smart Ring 4 - Stealth - Size 9 - | 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/71EiYyz2UNL.jpg)
![Oura Smart Ring 4 - Stealth - Size 9 - | 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/613EYvr-lAL.jpg)
![Oura Smart Ring 4 - Stealth - Size 9 - | 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/61hE2tAIk5L.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 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
- Oura Ring 4 Charger - Size 9 - Charging Dock and USB-C Cable - Charges Oura Ring 4 up to 8 Days
- sylacor Ring Cover for Oura Ring Gen 4/ Gen 3, Anti-Scratch Elastic Silicone Oura Ring Case Protector for Men Women Working Out Gym

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**Shop now:** [https://www.desertcart.ro/products/706499391-oura-smart-ring-4-stealth-size-9-non-standard-fit](https://www.desertcart.ro/products/706499391-oura-smart-ring-4-stealth-size-9-non-standard-fit)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-09-02*