---
product_id: 722783734
title: "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: "€ 631.61"
currency: EUR
in_stock: true
reviews_count: 13
category: "Oura"
url: https://www.desertcart.hr/products/722783734-smart-ring-4-stealth-size-12-non-standard-fit-measure
store_origin: HR
region: Croatia
---

# Compact & sleek design Long-lasting wireless battery Advanced heart & sleep tracking 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:** € 631.61
**Availability:** ✅ In Stock

## Summary

> 💍 Own your health journey with stealthy sophistication.

## Quick Answers

- **What is this?** 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?** € 631.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/722783734-smart-ring-4-stealth-size-12-non-standard-fit-measure)

## 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

- • **Power That Keeps Up:** Enjoy extended battery life with wireless charging—no downtime, just continuous health monitoring to keep you ahead.
- • **Tailored to Your Style:** Available in multiple finishes and sizes, the Oura Ring 4 blends cutting-edge tech with personalized elegance—because your health device should look as good as it performs.
- • **Effortless All-Day Comfort:** Designed for seamless wear, the stealthy Oura Ring 4 fits like a second skin, perfect for busy professionals who demand style and function.
- • **Next-Level Health Insights:** Track your heart rate, sleep quality, and daily activity with precision, empowering smarter wellness decisions backed by real data.
- • **Smartphone Sync, Simplified:** Instantly connect to your phone for detailed analytics and personalized health nudges, making wellness tracking intuitive and actionable.

## Overview

The Oura Ring 4 Stealth is a compact, stylish biometric ring designed for continuous health monitoring. It tracks heart rate, sleep patterns, and activity with advanced sensors, offers long battery life with wireless charging, and seamlessly integrates with smartphone apps for detailed analytics. Available in multiple sizes and finishes, it combines cutting-edge technology with everyday comfort and personalized style.

## Description

Free delivery and returns on eligible orders. Buy Oura Ring 4 - Stealth - Size 12 - Size Before You Buy at desertcart UK.

Review: Great Product - Great Product does the job on tracking sleep, heart rate, movement etc. Very easy to set up and get going. Would recommend for those that do not want to wear a smart watch.
Review: So So Happy! - I hesitated for a while before investing in this gadget. And I love my Gadgets! but after doing some homework on the competition, I decided to jump for it. First, the fit and metal colour are great, I couldn't be happier, the quality and durability is insane, i do everything with it, I rarely take it off. The connectivity to my Samsung Z Fold6 was flawless, no hiccups, plus, everything you open the app, it updates in no time. so great compatibility. Now, you need to give it time to gather data about you, of course... it will not happen overnight which is quite right, but the intel you get afterwards is great. Your body age, sleep quality, energy available, your stress, it is such a great little ring. it is a lot of money for such a small device but the value for money is worth it. I highly recommend it if you are curious and want to be nudge in the right direction for better health.

## 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 |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | 295 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 2 in Wearable Tech Rings |
| Colour | Stealth |
| Connectivity technologies | Bluetooth, USB |
| Customer Reviews | 4.3 4.3 out of 5 stars (5,485) |
| Date First Available | 3 Oct. 2024 |
| GPS | No GPS |
| Human interface input | Buttons |
| Item Weight | 190 g |
| Item model number | JZ90-54218-12 |
| OS | Android |
| Other display features | Wireless |
| Product Dimensions | 2.6 x 2.6 x 0.8 cm; 190 g |
| Special features | Sleep Monitor |
| What’s in the box | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |

## 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

![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/51NatpBotdL.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Product
*by L***S on 23 March 2026*

Great Product does the job on tracking sleep, heart rate, movement etc. Very easy to set up and get going. Would recommend for those that do not want to wear a smart watch.

### ⭐⭐⭐⭐⭐ So So Happy!
*by M***D on 18 October 2025*

I hesitated for a while before investing in this gadget. And I love my Gadgets! but after doing some homework on the competition, I decided to jump for it. First, the fit and metal colour are great, I couldn't be happier, the quality and durability is insane, i do everything with it, I rarely take it off. The connectivity to my Samsung Z Fold6 was flawless, no hiccups, plus, everything you open the app, it updates in no time. so great compatibility. Now, you need to give it time to gather data about you, of course... it will not happen overnight which is quite right, but the intel you get afterwards is great. Your body age, sleep quality, energy available, your stress, it is such a great little ring. it is a lot of money for such a small device but the value for money is worth it. I highly recommend it if you are curious and want to be nudge in the right direction for better health.

### ⭐⭐⭐⭐⭐ Great item, very efficient at tracking
*by L***N on 8 April 2026*

I love this ring, it does everything and more that you could ever want from a fitness tracker. It also works really well alongside your Apple Watch. I would highly recommend and it was sent to me within 24 hours.

## 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.hr/products/722783734-smart-ring-4-stealth-size-12-non-standard-fit-measure](https://www.desertcart.hr/products/722783734-smart-ring-4-stealth-size-12-non-standard-fit-measure)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-16*