---
product_id: 703350407
title: "– Ring 4 - Silver - Size 8 - Smart Ring | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life"
brand: "oura"
price: "NT$22073"
currency: TWD
in_stock: true
category: "Oura"
url: https://www.desertcart.tw/products/703350407-ring-4-silver-size-8-smart-ring-sleep-tracking-wearable
store_origin: TW
region: Taiwan
---

# 8 days battery life Advanced heart rate monitoring Seamless app integration – Ring 4 - Silver - Size 8 - Smart Ring | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life

**Brand:** oura
**Price:** NT$22073
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** – Ring 4 - Silver - Size 8 - Smart Ring | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life by oura
- **How much does it cost?** NT$22073 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/703350407-ring-4-silver-size-8-smart-ring-sleep-tracking-wearable)

## 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

- • **Stay unplugged longer:** Up to 8 days of battery life with fast wireless charging—less downtime, more you
- • **Style that fits your vibe:** Available in multiple finishes and sizes to match your personal aesthetic
- • **Track your health like a pro:** Precision heart rate, sleep, and activity monitoring to optimize your wellness
- • **All-day comfort meets cutting-edge tech:** Sleek titanium design for effortless wear and durability
- • **Data-driven insights at your fingertips:** Syncs seamlessly with 40+ apps including Apple Health and Strava for holistic tracking

## Overview

The OURA Ring 4 in Silver is a sleek, titanium smart ring designed for adults seeking advanced health tracking. It monitors heart rate, sleep patterns, and activity with precision sensors, offers up to 8 days of battery life with quick wireless charging, and integrates seamlessly with over 40 popular health apps. Water-resistant and lightweight, it combines style and functionality for the modern wellness enthusiast.

## Description

Free delivery and returns on eligible orders. Buy OURA Ring 4 - Silver - Size 8 - Smart Ring | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life at desertcart UK.

## 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 | B0D9WVSZ56 |
| Age Range Description | Adult |
| Band Colour | Silver |
| Band Material Type | Titanium |
| Battery Average Life | 8 days |
| Battery Capacity | 26 Milliamp Hours |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | 500 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 1 in Wearable Tech Rings |
| Box Contents | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Brand Name | OURA |
| Case Material Type | Titanium |
| Closure Type | Slip On |
| Colour | Silver |
| Communication Feature | App Integration, Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | iOS, Android |
| Connectivity Technology | Bluetooth, USB |
| Controller Type | Remote control via smartphone |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 4.2 out of 5 stars (8,731) |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Global Trade Identification Number | 06430060153400, 06430060155275 |
| Human Interface Input | Buttons |
| Item Dimensions | 25 x 25 x 7 millimetres |
| Item Dimensions D x W x H | 25D x 25W x 7H millimetres |
| Item Weight | 5.2 Grams |
| Manufacturer | Oura |
| Memory Storage Capacity | 5 MB |
| Metrics Measured | optical, accelerometer |
| Model Name | Oura Ring 4 - Silver - Size 8 |
| Model Number | JZ90-54217-08 |
| Operating System | Android |
| Product Features | Heart Rate Monitor, Activity Tracker |
| Product Warranty | 3 year manufacturer warranty |
| Shape | Ring |
| Sport Type | Multi-Sports |
| Style Name | Modern |
| Supported Application | Over 40 apps including Apple Health, Google Health Connect, Natural Cycles, Flo, Strava, & more |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adult |
| Unit Count | 1.0 count |
| Warranty Type | Lifetime |
| Water Resistance Depth | 1 Metres |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IP68 |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |

## Product Details

- **Battery capacity:** 26 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity technology:** Bluetooth, USB
- **GPS:** No GPS
- **Memory storage capacity:** 5 MB
- **Operating system:** Android
- **Shape:** Ring
- **Special feature:** Heart Rate Monitor, Activity Tracker
- **Wireless communication standard:** Bluetooth

## Images

![– Ring 4 - Silver - Size 8 - Smart Ring | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life - Image 1](https://m.media-amazon.com/images/I/5155uTN9BPL.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 - Silver - Size 8 - 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
- ZOOROO 2-Pack 14K Gold Plated Stacking Rings for Oura Gen 4/Oura Gen 3, Cubic Zirconia Simulated Diamond Oura Ring Stack for Women

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**Shop now:** [https://www.desertcart.tw/products/703350407-ring-4-silver-size-8-smart-ring-sleep-tracking-wearable](https://www.desertcart.tw/products/703350407-ring-4-silver-size-8-smart-ring-sleep-tracking-wearable)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-09-20*