---
product_id: 734025846
title: "Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life"
brand: "oura"
price: "€ 4.13"
currency: EUR
in_stock: false
url: https://www.desertcart.sk/products/734025846-oura-ring-4-stealth-size-13-smart-ring-unique-sizing
store_origin: SK
region: Slovakia
---

# Up to 8 Days Battery Life Advanced Sleep & Activity Tracking 24/7 Heart Rate Monitor Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life

**Brand:** oura
**Price:** € 4.13
**Availability:** ❌ Out of Stock

## Summary

> 💍 Own your health, invisibly powerful.

## Quick Answers

- **What is this?** Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life by oura
- **How much does it cost?** € 4.13 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/734025846-oura-ring-4-stealth-size-13-smart-ring-unique-sizing)

## 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

- • **Seamless Smart Integration:** Bluetooth connectivity syncs effortlessly with your smartphone for real-time insights.
- • **Unplug Longer, Live Fuller:** Enjoy up to 8 days of battery life—less charging, more doing.
- • **Discreet, Sleek, and Stealthy:** Minimalist design with no display—wear your wellness without the bulk.
- • **Sleep Smarter, Perform Better:** Track your sleep stages and recovery to optimize your daily energy.
- • **Stay Ahead with Precision Health:** Continuous heart rate monitoring keeps you in tune with your body’s rhythm.

## Overview

The Oura Ring 4 Stealth is a cutting-edge smart ring designed for professionals who demand precise health insights without compromising style. Featuring continuous heart rate monitoring, advanced sleep and activity tracking, and up to 8 days of battery life, it seamlessly syncs with your smartphone via Bluetooth. Its sleek, display-free design offers a discreet yet powerful wellness companion that fits uniquely to your finger size, making it the ultimate wearable for optimizing performance and recovery.

## Description

Full description not available

## Features

- Heart Rate Monitor, Activity Tracker

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | OURA |
| Manufacturer | Oura |
| Model | JZ90-54218-13 |
| Product Dimensions | 2.7 x 2.7 x 0.8 cm; 181 g |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Item model number | JZ90-54218-13 |
| Compatible Devices | Smartphone |
| Special Features | Heart Rate Monitor, Activity Tracker |
| Mounting Hardware | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
| Number of items | 1 |
| Display Type | No Display |
| Batteries Included | Yes |
| Batteries Required | Yes |
| Battery cell composition | Lithium Polymer |
| Wireless Type | Bluetooth |
| Connector Type | Bluetooth |
| Device interface - primary | Touchscreen |
| Includes Rechargeable Battery | Yes |
| Manufacturer | Oura |
| Item Weight | 181 g |

## Product Details

- **Special Feature:** Heart Rate Monitor, Activity Tracker
- **Connectivity Technology:** Bluetooth
- **Wireless Communication Standard:** Bluetooth
- **Battery Cell Composition:** Lithium Polymer
- **Shape:** Round

## Images

![Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life - Image 1](https://m.media-amazon.com/images/I/51-7ivDG+6L.jpg)
![Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life - Image 2](https://m.media-amazon.com/images/I/51IDrh-0YEL.jpg)
![Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life - Image 3](https://m.media-amazon.com/images/I/71l8InHaa7L.jpg)
![Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life - Image 4](https://m.media-amazon.com/images/I/713l574H8CL.jpg)
![Oura Ring 4 - Stealth - Size 13 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life - Image 5](https://m.media-amazon.com/images/I/71H17unV-KL.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 13 - 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 13 - Charging Dock and USB-C Cable - Charges Oura Ring 4 up to 8 Days

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**Shop now:** [https://www.desertcart.sk/products/734025846-oura-ring-4-stealth-size-13-smart-ring-unique-sizing](https://www.desertcart.sk/products/734025846-oura-ring-4-stealth-size-13-smart-ring-unique-sizing)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-28*