---
product_id: 661324824
title: "Oura Ring 4 - Black - 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: "20152084₫"
currency: VND
in_stock: true
reviews_count: 8
category: "Oura"
url: https://www.desertcart.vn/products/661324824-oura-ring-4-black-size-10-sleep-activity-women-s
store_origin: VN
region: Vietnam
---

# Tracks 50+ health metrics Water resistant up to 100m Up to 8 days battery life Oura Ring 4 - Black - 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:** 20152084₫
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Oura Ring 4 - Black - 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?** 20152084₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/661324824-oura-ring-4-black-size-10-sleep-activity-women-s)

## 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

- • **Tailored Fit Guarantee:** Unique sizing kit ensures your perfect ring fit before you buy.
- • **Effortless All-Day Wear:** Sleek, lightweight titanium design built for comfort and durability.
- • **Extended Battery Freedom:** Stay unplugged with up to 8 days of uninterrupted tracking.
- • **Precision Health Insights:** Smart Sensing adapts to your unique biometrics for 24/7 accuracy.
- • **Seamless Multi-Device Sync:** Bluetooth connectivity with iOS & Android keeps your data always in reach.

## Overview

The Oura Ring 4 is a cutting-edge smart ring designed for continuous health monitoring, tracking over 50 metrics including sleep, activity, stress, and women’s health. Crafted from durable titanium and water resistant up to 100 meters, it offers a comfortable 24/7 wear experience. With up to 8 days of battery life and seamless Bluetooth compatibility with iOS and Android devices, it empowers professionals to optimize wellness effortlessly. The included sizing kit ensures a perfect fit, while the Oura membership unlocks personalized AI-driven health insights.

## 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.

Review: Phenomenal Sleep Tracking Tool - I got this Oura ring for my wife for Christmas this past year and she loves it as well as the rose gold color. It's a very good way to take control of your sleep and improve sleep quality. The ring tracks your sleep down to the minute, is crazy accurate, and works with an app that, once installed, works offline and connects to the ring through Bluetooth. Every morning you can get a full breakdown on the app of your sleep pattern for the night including sleep stages (light, REM, deep), heart rate, heart rate variability, body temperature, respiratory rate, total sleep vs time in bed, your sleep efficiency, your "body clock" and even "sleep debt" (which tracks how much sleep you're getting vs how much you need for your body type). It also tracks the menstrual cycle for women, which my wife uses and likes a lot. She's been able to figure out a pattern based on her heart rate that happens the day before her period actually starts, which works every time - super cool! Of course it does other things like tracks your steps, exercise, you can log your meals etc. Too many things for me to include in this review. The ring fits my wife's finger perfectly. Before you buy you have to purchase the ring sizing kit, which is cheap, and you can use it for friends if you refer people (which you can get awarded for monetarily). The sizing is pretty easy, wear one of the sizers for a day and make sure it's comfortable and then order your ring. I've also seen the ring sizing kits on display in places like Costco or Best Buy, so that's another option without having to buy the kit. The battery lasts about a week, which is pretty good. And it charges in less than an hour, sometimes half an hour if she's charging it more regularly than a week (which your supposed to do). My own Oura Ring 4 is over a year old and I have to charge it every 2-3 days. I admit, I did not follow their recommendations for maintaining the best battery life, so can't complain there. Overall, Oura Ring is fantastic and I'd highly recommend it to anyone. My wife and I have both been able to improve our overall sleep quality since using them. They are a very good tool for that if you want to prioritize sleep in relation to health (which anyone should).
Review: Amazing product & customer support service!!!! - I absolutely love this ring and all it offers. I’ve recommended it to everyone who has asked about it in the 11 months I’ve been wearing it (24/7). I know at least one person who has purchased one based off of my recommendation. Lately, within just the last few weeks, I’ve noticed the battery life has decreased sufficiently. Going from 5-6 days between charges to 2-3 days. Then the last week, I’ve begun having connectivity issues. While frustrating, I love this ring. So much so that I was seriously considering buying another one. But that $400.00 price tag is steep. Today I decided to submit a question for help through the app. Within 5 minutes tops, the virtual assistant determined I was indeed having issues, confirmed the ring I have is in stock and informed me that a replacement would be shipped with arrival time at 1-2 weeks. I am just under the year (purchased 4/8/2025 and today is 3/4/2026) but that was unexpected and honestly, amazing!!! I am so impressed. Enough so, I came to desertcart to write a review (which I never do). I will continue to recommend this product to anyone and everyone who asks!!!

## Features

- ACCURACY - SMART SENSING - Oura tracks over 50 health metrics, including sleep, activity, stress, heart health, metabolic health,and women’s health metrics. Smart Sensing technology 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 5 to 8 days of battery life, no screens and no vibrations, Oura Ring 4 Ceramic 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 7.99/mo afterwards. Membership is tied to your account via the Oura App, not your physical ring
- DESIGNED FOR 24/7 WEAR - The updated design of the Oura Ring 4 is more comfortable, fits better than ever, and is water resistant. The first all-titanium smart ring combines exceptional durability with a gentle touch, even for sensitive skin

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WV1TPJ |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Band Material Type | Metal |
| Battery Average Life | 5 days |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | #55 in Electronics ( See Top 100 in Electronics ) #1 in Smart Rings |
| Brand | OURA |
| Built-In Media | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
| Closure Type | Ring |
| Color | M - Black |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Connectivity Technology | Bluetooth |
| Customer Reviews | 4.2 4.2 out of 5 stars (9,741) |
| Display Type | No Display |
| GPS Geotagging Functionality | GPS Via Smartphone |
| Global Trade Identification Number | 06430060153189 |
| Human Interface Input | Buttons |
| Item Dimensions | 1.06 x 1.06 x 0.28 inches |
| Manufacturer | Oura |
| Metrics Measured | Body Temperature, Menstrual Cycle, Sleep Duration, Stress |
| Model Number | JZ90-54144-10 |
| Operating System | i_os, android |
| Shape | Round |
| Style Name | Metallic |
| Supported Application | Fitness Tracker, Sleep Monitor, Heart Rate Monitor, Multisport Tracker, Health, Wellness |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adults |
| 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 Cell Composition:** Lithium Polymer
- **Brand:** OURA
- **Color:** M - Black
- **Connectivity Technology:** Bluetooth
- **GPS:** GPS Via Smartphone
- **Operating System:** i_os, android
- **Shape:** Round
- **Special Feature:** Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight
- **Style:** Metallic
- **Wireless Communication Standard:** Bluetooth

## Images

![Oura Ring 4 - Black - 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/51nCNxSwfYL.jpg)
![Oura Ring 4 - Black - Size 10 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible - Image 2](https://m.media-amazon.com/images/I/51QDuTKnNyL.jpg)
![Oura Ring 4 - Black - Size 10 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible - Image 3](https://m.media-amazon.com/images/I/616TtSRJf2L.jpg)
![Oura Ring 4 - Black - Size 10 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible - Image 4](https://m.media-amazon.com/images/I/71NT8fo7vNL.jpg)
![Oura Ring 4 - Black - Size 10 - Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible - Image 5](https://m.media-amazon.com/images/I/61zUDFM6dbL.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

### ⭐⭐⭐⭐⭐ Phenomenal Sleep Tracking Tool
*by K***H on February 20, 2026*

I got this Oura ring for my wife for Christmas this past year and she loves it as well as the rose gold color. It's a very good way to take control of your sleep and improve sleep quality. The ring tracks your sleep down to the minute, is crazy accurate, and works with an app that, once installed, works offline and connects to the ring through Bluetooth. Every morning you can get a full breakdown on the app of your sleep pattern for the night including sleep stages (light, REM, deep), heart rate, heart rate variability, body temperature, respiratory rate, total sleep vs time in bed, your sleep efficiency, your "body clock" and even "sleep debt" (which tracks how much sleep you're getting vs how much you need for your body type). It also tracks the menstrual cycle for women, which my wife uses and likes a lot. She's been able to figure out a pattern based on her heart rate that happens the day before her period actually starts, which works every time - super cool! Of course it does other things like tracks your steps, exercise, you can log your meals etc. Too many things for me to include in this review. The ring fits my wife's finger perfectly. Before you buy you have to purchase the ring sizing kit, which is cheap, and you can use it for friends if you refer people (which you can get awarded for monetarily). The sizing is pretty easy, wear one of the sizers for a day and make sure it's comfortable and then order your ring. I've also seen the ring sizing kits on display in places like Costco or Best Buy, so that's another option without having to buy the kit. The battery lasts about a week, which is pretty good. And it charges in less than an hour, sometimes half an hour if she's charging it more regularly than a week (which your supposed to do). My own Oura Ring 4 is over a year old and I have to charge it every 2-3 days. I admit, I did not follow their recommendations for maintaining the best battery life, so can't complain there. Overall, Oura Ring is fantastic and I'd highly recommend it to anyone. My wife and I have both been able to improve our overall sleep quality since using them. They are a very good tool for that if you want to prioritize sleep in relation to health (which anyone should).

### ⭐⭐⭐⭐⭐ Amazing product & customer support service!!!!
*by K***. on March 4, 2026*

I absolutely love this ring and all it offers. I’ve recommended it to everyone who has asked about it in the 11 months I’ve been wearing it (24/7). I know at least one person who has purchased one based off of my recommendation. Lately, within just the last few weeks, I’ve noticed the battery life has decreased sufficiently. Going from 5-6 days between charges to 2-3 days. Then the last week, I’ve begun having connectivity issues. While frustrating, I love this ring. So much so that I was seriously considering buying another one. But that $400.00 price tag is steep. Today I decided to submit a question for help through the app. Within 5 minutes tops, the virtual assistant determined I was indeed having issues, confirmed the ring I have is in stock and informed me that a replacement would be shipped with arrival time at 1-2 weeks. I am just under the year (purchased 4/8/2025 and today is 3/4/2026) but that was unexpected and honestly, amazing!!! I am so impressed. Enough so, I came to Amazon to write a review (which I never do). I will continue to recommend this product to anyone and everyone who asks!!!

### ⭐⭐⭐⭐⭐ ⭐⭐⭐⭐⭐ 5/5 – Game-changer for my fitness and wellbeing
*by C***H on February 28, 2026*

I work out 5 days a week, and my Oura Ring Gen 4 has been an absolute game-changer for my routine and recovery. The sleep tracking alone has helped me understand how my body actually recovers, not just how hard I train. Seeing my sleep quality, readiness, and recovery metrics every morning has completely changed how I plan my workouts. What really stands out is how seamlessly it tracks my overall wellbeing—from sleep stages and recovery to daily readiness and trends over time. It’s helped me dial in better habits, know when to push hard, and when to prioritize rest. The insights feel meaningful and actionable, not just data for data’s sake. On top of that, it’s comfortable, unobtrusive, and easy to wear 24/7. The battery life is great, it runs easily for about 6-7 days with one full charge, plus it charges pretty quickly. If you’re serious about training, recovery, and long-term health, this ring is 100% worth it. I honestly can’t imagine my routine without it now. 💪

## Frequently Bought Together

- Oura Ring 4 - Black - 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
- 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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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-24*