---
product_id: 722958545
title: "– Smart Ring 4 - Stealth - Size 5 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible"
brand: "oura"
price: "฿36975"
currency: THB
in_stock: true
reviews_count: 13
category: "Oura"
url: https://www.desertcart.co.th/products/722958545-smart-ring-4-stealth-size-5-non-standard-fit-measure
store_origin: TH
region: Thailand
---

# 8-day battery life Advanced sleep tracking Comprehensive health analytics – Smart Ring 4 - Stealth - Size 5 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible

**Brand:** oura
**Price:** ฿36975
**Availability:** ✅ In Stock

## Summary

> 💍 Own your health, invisibly powerful.

## Quick Answers

- **What is this?** – Smart Ring 4 - Stealth - Size 5 - | 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?** ฿36975 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/722958545-smart-ring-4-stealth-size-5-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 Lasts:** Up to 8 days of battery life means less charging, more living—wireless USB-C charging included.
- • **Deep Sleep Insights:** Unlock your best rest with precision sleep pattern analysis that guides your recovery.
- • **Tailored Fit & Style:** Non-standard sizing with a free size kit ensures a perfect fit, while stealth finish keeps it subtle yet sophisticated.
- • **Effortless All-Day Wear:** Sleek, minimalist design fits seamlessly into your lifestyle without bulk or fuss.
- • **Smartphone Sync Mastery:** Instant Bluetooth connection to iOS and Android apps delivers real-time health data at your fingertips.

## Overview

The Oura Smart Ring 4 in Stealth is a cutting-edge wearable designed for professionals who demand precise health insights without compromising style. Featuring advanced heart rate and sleep tracking, an impressive 8-day battery life with wireless USB-C charging, and seamless Bluetooth integration with iOS and Android devices, it offers a personalized, minimalist experience. Its non-standard sizing kit ensures a perfect fit, making it the ultimate discreet health companion for the modern millennial manager.

## Description

Free delivery and returns on eligible orders. Buy Oura Smart Ring 4 - Stealth - Size 5 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible at desertcart UK.

Review: Great insight on an easy to use app. I love it - I LOVE my Oura. The app is easy to use and the more you wear it, the more insight you get. Great for monitoring exercise and learning when you need to rest. It’s not cheap, but it works so well it’s decent value. Batter lasts a long time. Just wish I’d waited and got the new smaller version as it’s quite large.
Review: Best bit of health kit I’ve bought! - Completely addictive, so interesting in terms of the info - I’m debating moving away from my Apple Watch as the battery on this is so much better - I always charge my watch overnight but the sleep info on the Oura is great, amazing accuracy on the patterns! The battery life i would say isn’t quite as long as described but still a few days so good enough! Super easy to set up and use, debating the travel charge case but at the moment not sure it’s needed as the charger is just USB C. Definitely worth ordering the fitting measure, I wouldn’t have had a clue but annoying when you decide you want to go for it as adds a few days before you can purchase. Once bought though a perfect fit. I bought the brushed silver and have had quite a few compliments, it’s a really nice, non flashy piece that blends well with other items of jewellery. Expensive but so far I would say worth it :)

## 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 | B0D9WWLN7H |
| Age Range Description | Adult |
| Band Material Type | Silicone |
| Battery Average Life | 8 days |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Battery cell composition | Lithium Polymer |
| Best Sellers Rank | 442 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 |
| Closure Type | No Closure |
| 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 | 4.3 out of 5 stars 8,658 Reviews |
| Display Type | Analog |
| GPS | No GPS |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Buttons |
| Item Dimensions | 27 x 27 x 8 millimetres |
| Item Dimensions D x W x H | 8D x 27W x 8H millimetres |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate, Sleep Duration |
| Model Name | Oura Ring 4 - Stealth - Size 5 |
| Model Number | JZ90-54218-05 |
| Operating System | Android |
| Operating system | Android |
| Product Features | Aktivitäts-Tracker |
| Product Warranty | 3 year manufacturer warranty |
| Shape | Round |
| Special feature | Aktivitäts-Tracker |
| Style Name | Minimalist |
| Supported Application | Sleep Monitor, Activity Tracker, Stress Monitor, Heart Rate Monitor |
| Supported Satellite Navigation System | GPS |
| Target Audience | Uni-Erwachsene |
| Unit Count | 1.0 count |
| Warranty Type | Lifetime |
| Water Resistance Depth | 5 Metres |
| Water Resistance Level | Not Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless communication standard | Bluetooth |

## Product Details

- **Battery cell composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity technology:** Bluetooth
- **GPS:** No GPS
- **Model name:** Oura Ring 4 - Stealth - Size 5
- **Operating system:** Android
- **Shape:** Round
- **Special feature:** Aktivitäts-Tracker
- **Style:** Minimalist
- **Wireless communication standard:** Bluetooth

## Images

![– Smart Ring 4 - Stealth - Size 5 - | 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)
![– Smart Ring 4 - Stealth - Size 5 - | 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)
![– Smart Ring 4 - Stealth - Size 5 - | 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)
![– Smart Ring 4 - Stealth - Size 5 - | 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)
![– Smart Ring 4 - Stealth - Size 5 - | 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great insight on an easy to use app. I love it
*by D***. on 21 August 2026*

I LOVE my Oura. The app is easy to use and the more you wear it, the more insight you get. Great for monitoring exercise and learning when you need to rest. It’s not cheap, but it works so well it’s decent value. Batter lasts a long time. Just wish I’d waited and got the new smaller version as it’s quite large.

### ⭐⭐⭐⭐⭐ Best bit of health kit I’ve bought!
*by H***. on 21 May 2026*

Completely addictive, so interesting in terms of the info - I’m debating moving away from my Apple Watch as the battery on this is so much better - I always charge my watch overnight but the sleep info on the Oura is great, amazing accuracy on the patterns! The battery life i would say isn’t quite as long as described but still a few days so good enough! Super easy to set up and use, debating the travel charge case but at the moment not sure it’s needed as the charger is just USB C. Definitely worth ordering the fitting measure, I wouldn’t have had a clue but annoying when you decide you want to go for it as adds a few days before you can purchase. Once bought though a perfect fit. I bought the brushed silver and have had quite a few compliments, it’s a really nice, non flashy piece that blends well with other items of jewellery. Expensive but so far I would say worth it :)

### ⭐⭐⭐⭐⭐ Expensive but good value!
*by A***R on 23 February 2026*

Really impressed, it's been tracking my sleep and helping manage my diet and exercise. It's comfortable and pretty stylish. The app is easy to use and doesn't bother me all the time with ads or useless notifications. It's very expensive and having to pay a subscription isn't the best but I think it's pretty good value for the technology in it. It was really easy to set up and hasn't had any connection drop outs or other issues. I'm a little concerned that the next ring will not be compatible with my current charger or case if I decide to get one. I hope it will be but the 3rd gen isn't compatible with 4th so that's something to know if you're buying in a few years and the 5th gen is due out. Hopefully I'm wrong and backwards and forwards compatibility won't be a problem. I like the idea of being able to give friends a discount link right from the app but it would be better if I got a month of my subscription free if they buy. I much prefer this form factor to a watch but you do give up easy heart rate monitoring so maybe a widget that can be pinned to a phone screen or even a small screen on the ring would be something cool to add in the future. Blood pressure monitoring would also really be a cool thing to add but that might not be possible. One other thing to keep in mind if you are buying is it really needs a lot of data to get the most out of it so for the first couple of weeks to a month it won't give you all the readings. In conclusion, I love it, I'm really pleased with the fit and the colour I chose. The app is great and I wish I'd had one years ago. Very happy customer.

## Frequently Bought Together

- Oura Ring 4 - Stealth - Size 5 - 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 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase
- 10 Pack Ring Cover Compatible with Oura Ring Gen 4/Oura Ring Gen 3/Samsung Galaxy Ring, 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.co.th/products/722958545-smart-ring-4-stealth-size-5-non-standard-fit-measure](https://www.desertcart.co.th/products/722958545-smart-ring-4-stealth-size-5-non-standard-fit-measure)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-09-08*