---
product_id: 698086829
title: "Oura Smart Ring 4 - Black - Size 15 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible"
brand: "oura"
price: "$1125.55"
currency: USD
in_stock: true
category: "Oura"
url: https://www.desertcart.ec/products/698086829-oura-smart-ring-4-black-size-15-non-standard-fit
store_origin: EC
region: Ecuador
---

# 8-day battery life 100m water resistant Advanced health metrics Oura Smart Ring 4 - Black - Size 15 - | Non-Standard Fit – Measure with a Size Kit |Sleep, Heart Rate and Fitness Tracking Wearable | 8-Day Battery, iOS / Android Compatible

**Brand:** oura
**Price:** $1125.55
**Availability:** ✅ In Stock

## Summary

> 💍 Elevate your wellness game with the ring that works as hard as you do.

## Quick Answers

- **What is this?** Oura Smart Ring 4 - Black - Size 15 - | 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?** $1125.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/698086829-oura-smart-ring-4-black-size-15-non-standard-fit)

## 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

- • **Deep Health Insights:** Track heart rate, sleep quality, and multi-sport activity with precision sensors that empower smarter wellness decisions.
- • **Waterproof Confidence:** Dive into your day worry-free with 100 meters of water resistance—perfect for active lifestyles and spontaneous adventures.
- • **All-Day Power, No Pause:** Enjoy a full 8 days of uninterrupted tracking with rapid 80-minute wireless charging—stay ahead without the downtime.
- • **Seamless Smartphone Sync:** Effortlessly connect via Bluetooth to iOS or Android devices for real-time analytics and personalized health coaching.
- • **Sleek Titanium Minimalism:** Crafted from durable titanium in a stealthy black finish, this ring blends cutting-edge tech with refined style for the modern professional.

## Overview

The Oura Smart Ring 4 is a sleek, titanium wearable designed for continuous health monitoring, including heart rate, sleep, and activity tracking. With an impressive 8-day battery life, 100m water resistance, and seamless Bluetooth connectivity to iOS and Android, it offers professional-grade insights in a minimalist form factor tailored for everyday comfort and style.

## Description

Free delivery and returns on eligible orders. Buy Oura Smart Ring 4 - Black - Size 15 - | 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 | B0D9WWBQSG |
| Age Range Description | Adult |
| Band Colour | Black |
| Band Material Type | Titanium |
| Battery Average Life | 8 days |
| Battery Capacity | 8000 Milliamp Hours |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Battery capacity | 8000 Milliamp Hours |
| Battery cell composition | Lithium Polymer |
| Best Sellers Rank | 432 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 2 in Wearable Tech Rings |
| Box Contents | Oura Ring 4, Oura Ring 4 Charger, USB-C Cable, Information Booklet, Quick Start Guide |
| Brand Name | OURA |
| Case Material Type | Titanium |
| Clasp Type | Tang Buckle |
| Closure Type | Tang Buckle |
| Colour | Black |
| Communication Feature | Bluetooth |
| Compatible Devices | Tablet, Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Connectivity Technology | Bluetooth |
| Connectivity technology | Bluetooth |
| Controller Type | Ring |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 out of 5 stars 8,657 Reviews |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Global Trade Identification Number | 06430060153233 |
| Human Interface Input | Unknown |
| Item Dimensions | 24 x 24 x 7 millimetres |
| Item Dimensions D x W x H | 24D x 24W x 7H millimetres |
| Item Weight | 0.19 Kilograms |
| Manufacturer | Oura |
| Metrics Measured | Accelerometer |
| Model Name | Oura Ring 4 - Black - Size 15 |
| Model Number | JZ90-54144-15 |
| Operating System | Android |
| Operating system | Android |
| Product Features | Activity Tracker |
| Product Warranty | 3 year manufacturer warranty |
| Shape | Ring |
| Special feature | Activity Tracker |
| Sport Type | Multi-Sports |
| Style Name | Minimalist |
| Supported Application | Fitness Tracker |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adults |
| Warranty Type | Lifetime |
| Water Resistance Depth | 100 Metres |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless communication standard | Bluetooth |

## Product Details

- **Battery capacity:** 8000 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity technology:** Bluetooth
- **GPS:** No GPS
- **Model name:** Oura Ring 4 - Black - Size 15
- **Operating system:** Android
- **Shape:** Ring
- **Special feature:** Activity Tracker
- **Wireless communication standard:** Bluetooth

## Images

![Oura Smart Ring 4 - Black - Size 15 - | 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/513EeiCr+QL.jpg)
![Oura Smart Ring 4 - Black - Size 15 - | 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/51f7Md52AIL.jpg)
![Oura Smart Ring 4 - Black - Size 15 - | 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/71jVxf3HxrL.jpg)
![Oura Smart Ring 4 - Black - Size 15 - | 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)
![Oura Smart Ring 4 - Black - Size 15 - | 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/61FFomT0clL.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 - Black - Size 15 - 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 3 Pack Cover Compatible with Oura Ring Gen 4/Oura Ring Gen 3 Horizon/Gen 3 Heritage, Surport Charging with Cover on, Anti-Scratch TPU Protector for Men Women Workout Gym

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**Shop now:** [https://www.desertcart.ec/products/698086829-oura-smart-ring-4-black-size-15-non-standard-fit](https://www.desertcart.ec/products/698086829-oura-smart-ring-4-black-size-15-non-standard-fit)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-09-10*