---
product_id: 661427971
title: "Ring 4 - Smart Ring - Silver - Size 9 - Sleep, Activity, Women's Health, AI Advisor, Up to 8 Days of Battery Life, Oura App, Android & iOS Compatible"
brand: "oura"
price: "20088836₫"
currency: VND
in_stock: true
category: "Oura"
url: https://www.desertcart.vn/products/661427971-ring-4-smart-ring-silver-size-9-sleep-activity-womens
store_origin: VN
region: Vietnam
---

# Up to 8 days battery life IP68 waterproof rating 50+ adaptive health metrics Ring 4 - Smart Ring - Silver - Size 9 - Sleep, Activity, Women's Health, AI Advisor, Up to 8 Days of Battery Life, Oura App, Android & iOS Compatible

**Brand:** oura
**Price:** 20088836₫
**Availability:** ✅ In Stock

## Summary

> 💍 Elevate your health game with the ring that knows you best

## Quick Answers

- **What is this?** Ring 4 - Smart Ring - Silver - Size 9 - Sleep, Activity, Women's Health, AI Advisor, Up to 8 Days of Battery Life, Oura App, Android & iOS Compatible by oura
- **How much does it cost?** 20088836₫ 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/661427971-ring-4-smart-ring-silver-size-9-sleep-activity-womens)

## 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

- • **Long-Lasting Power:** Up to 8 days of battery life keeps you connected without interruption
- • **Waterproof & Ready:** IP68-rated for swimming, showering, and all your active moments
- • **All-Titanium Sleekness:** Durable, lightweight, and stylish for everyday wear
- • **Smart Sensing Platform:** AI-powered insights on sleep, stress, heart & women’s health
- • **Multi-Ring Style Flexibility:** Switch finishes effortlessly via the Oura App to match your vibe

## Overview

The Oura Ring 4 is a premium smart ring crafted from titanium, offering advanced biometric tracking across 50+ health metrics including sleep, activity, stress, and women’s health. With up to 8 days of battery life, IP68 waterproof rating, and seamless Bluetooth connectivity to iOS and Android devices, it delivers personalized AI-driven insights in a sleek, lightweight design. Multi-ring support lets you effortlessly switch styles via the Oura App, making it the ultimate health companion for the modern professional.

## 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.

## Features

- 154

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WWB3WX |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Age Range Description | Adult |
| Band Color | Silver |
| Band Material Type | Titanium |
| Battery Average Life | 5 days |
| Battery Capacity | 22 |
| Battery Cell Composition | Lithium Polymer |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | #31 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 |
| Case Material Type | Titanium |
| Closure Type | Slip On |
| Color | Silver |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Android Devices, iOS Devices |
| Connectivity Technology | Bluetooth |
| Controller Type | Ring |
| Customer Reviews | 4.0 out of 5 stars 7,714 Reviews |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Buttons |
| Item Dimensions | 1.02 x 1.02 x 0.28 inches |
| Item Weight | 0.18 Kilograms |
| Manufacturer | Oura |
| Metrics Measured | Body Temperature, Menstrual Cycle, Sleep Duration, Stress |
| Model Name | Oura Ring 4 |
| Model Number | JZ90-54217-09 |
| Operating System | i_os, android |
| RAM Memory Installed | 512 KB |
| Shape | Round |
| Special Feature | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Style Name | Metallic |
| Supported Application | Fitness Tracker |
| Target Audience | Unisex Adult |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Standard/Full |
| Water Resistance Depth | 100 Meters |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IP68 |
| Wearable Computer Type | Smart Ring |
| Wireless Communication Standard | Bluetooth |
| Wireless Compability | Bluetooth |

## Product Details

- **Battery Capacity:** 22
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity Technology:** Bluetooth
- **GPS:** No GPS
- **Model Name:** Oura Ring 4
- **Operating System:** i_os, android
- **Shape:** Round
- **Special Feature:** Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight
- **Wireless Communication Standard:** Bluetooth

## Images

![Ring 4 - Smart Ring - Silver - Size 9 - Sleep, Activity, Women's Health, AI Advisor, Up to 8 Days of Battery Life, Oura App, Android & iOS Compatible - Image 1](https://m.media-amazon.com/images/I/51ul5++ZdWL.jpg)

## Available Options

This product comes in different **Color, Size, Style** 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 - Silver - 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
- sylacor Ring Cover for Oura Ring Gen 4/ Gen 3, Anti-Scratch Elastic Silicone Oura Ring Case Protector for Men Women Working Out Gym
- 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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**Shop now:** [https://www.desertcart.vn/products/661427971-ring-4-smart-ring-silver-size-9-sleep-activity-womens](https://www.desertcart.vn/products/661427971-ring-4-smart-ring-silver-size-9-sleep-activity-womens)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-07-13*