---
product_id: 680369286
title: "Smart Ring 4 - Silver - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible"
brand: "oura"
price: "€ 471.40"
currency: EUR
in_stock: true
category: "Oura"
url: https://www.desertcart.pt/products/680369286-smart-ring-4-silver-size-10-non-standard-fit-measure
store_origin: PT
region: Portugal
---

# 8-day battery life Advanced heart rate sensor 100m water resistant Smart Ring 4 - Silver - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible

**Brand:** oura
**Price:** € 471.40
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Smart Ring 4 - Silver - Size 10 - | 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?** € 471.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/680369286-smart-ring-4-silver-size-10-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

- • **Precision Health Tracking:** Monitor heart rate, sleep quality, and activity with clinical-grade sensors for data you can trust.
- • **Smartphone Sync, Smarter You:** Effortlessly connect via Bluetooth to iOS or Android for personalized health insights and trend analytics.
- • **Waterproof for Every Adventure:** Dive, swim, or sweat—this ring keeps up with your active, on-the-go life up to 100 meters deep.
- • **All-Day Comfort, All-Night Insight:** Sleek titanium design fits seamlessly into your lifestyle without weighing you down.
- • **8 Days of Power, 80 Minutes to Full:** Stay unplugged longer with industry-leading battery life and fast wireless charging.

## Overview

The Oura Smart Ring 4 in silver combines cutting-edge biometric sensors with a sleek titanium build, offering 8-day battery life and 100m water resistance. Designed for adults seeking precise heart rate, sleep, and activity tracking, it syncs seamlessly with iOS and Android devices via Bluetooth, delivering deep health insights in a compact, stylish wearable.

## Description

Free delivery and returns on eligible orders. Buy Oura Smart Ring 4 - Silver - Size 10 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible 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 | B0D9WT1S2T |
| Age Range Description | Adult |
| Band Colour | Silver |
| Band Material Type | Silver |
| Battery Average Life | 8 days |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | 510 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 |
| Case Material Type | Titanium |
| Closure Type | Slip On |
| Colour | Silver |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone, Tablet |
| Compatible Phone Models | [Broad range of smartphone models] |
| Connectivity Technology | Bluetooth |
| Controller Type | Ring |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 4.2 out of 5 stars (8,744) |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Item Dimensions | 27 x 27 x 7 millimetres |
| Item Dimensions D x W x H | 27D x 27W x 7H millimetres |
| Item Weight | 180 Grams |
| Manufacturer | Oura |
| Metrics Measured | Combination of Accelerometers, Optical Heart Rate Sensors, and Other Sensors |
| Model Name | Oura Ring 4 |
| Model Number | JZ90-54217-10 |
| Operating System | Android |
| Product Features | Heart Rate Monitor, Activity Tracker |
| Product Warranty | 3 year manufacturer warranty |
| RAM Memory Installed | 16 MB |
| Shape | Round |
| Style Name | Modern |
| Supported Application | Third-party applications |
| Supported Satellite Navigation System | GPS |
| Target Audience | Adult |
| Warranty Type | Standard/Full |
| Water Resistance Depth | 100 Metres |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |

## Product Details

- **Battery cell composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity technology:** Bluetooth
- **GPS:** No GPS
- **Model name:** Oura Ring 4
- **Operating system:** Android
- **Shape:** Round
- **Special feature:** Heart Rate Monitor, Activity Tracker
- **Style:** Modern
- **Wireless communication standard:** Bluetooth

## Images

![Smart Ring 4 - Silver - Size 10 - | 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/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 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
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**Shop now:** [https://www.desertcart.pt/products/680369286-smart-ring-4-silver-size-10-non-standard-fit-measure](https://www.desertcart.pt/products/680369286-smart-ring-4-silver-size-10-non-standard-fit-measure)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-18*