---
product_id: 698086829
title: "Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit"
brand: "oura"
price: "$U45686"
currency: UYU
in_stock: true
reviews_count: 10
category: "Oura"
url: https://www.desertcart.uy/products/698086829-oura-ring-4-black-size-15-smart-sleep-tracking-wearable
store_origin: UY
region: Uruguay
---

# 24/7 heart rate monitoring Advanced sleep & activity analytics 8 days battery life Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit

**Brand:** oura
**Price:** $U45686
**Availability:** ✅ In Stock

## Summary

> 💍 Own your health, style, and sleep like a pro.

## Quick Answers

- **What is this?** Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit by oura
- **How much does it cost?** $U45686 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/698086829-oura-ring-4-black-size-15-smart-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

- • **Tailored to Your Style:** Available in multiple finishes and sizes, including the perfect fit with the sizing kit.
- • **Effortless All-Day Wear:** Sleek, compact design that fits seamlessly into your lifestyle—wear it everywhere, always.
- • **Power Through Your Week:** Up to 8 days of battery life with fast wireless charging—stay connected without the hassle.
- • **Next-Level Health Insights:** Track heart rate, sleep quality, stress, and energy levels with clinical-grade precision.
- • **Smartphone Sync, Smarter You:** Instant app updates and deep analytics for actionable health data at your fingertips.

## Overview

The Oura Ring 4 is a sleek, black smart ring designed for continuous health monitoring, including heart rate, sleep, and activity tracking. With up to 8 days of battery life and wireless charging, it offers seamless smartphone integration and personalized sizing options, making it the ultimate wearable for health-conscious professionals.

## Description

Free delivery and returns on eligible orders. Buy Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit at desertcart UK.

Review: So So Happy! - I hesitated for a while before investing in this gadget. And I love my Gadgets! but after doing some homework on the competition, I decided to jump for it. First, the fit and metal colour are great, I couldn't be happier, the quality and durability is insane, i do everything with it, I rarely take it off. The connectivity to my Samsung Z Fold6 was flawless, no hiccups, plus, everything you open the app, it updates in no time. so great compatibility. Now, you need to give it time to gather data about you, of course... it will not happen overnight which is quite right, but the intel you get afterwards is great. Your body age, sleep quality, energy available, your stress, it is such a great little ring. it is a lot of money for such a small device but the value for money is worth it. I highly recommend it if you are curious and want to be nudge in the right direction for better health.
Review: Wonderful - Amazing! The price was excellent, the quality is great, it tracks my sleep, my meals, my daily activity and it looks elegant and sleek. You can wear it for days and the battery lasts a lot. The best Christmas present!

## 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 |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | 274 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 2 in Wearable Tech Rings |
| Colour | Black |
| Connectivity technologies | Bluetooth |
| Customer Reviews | 4.3 4.3 out of 5 stars (5,291) |
| Date First Available | 3 Oct. 2024 |
| GPS | No GPS |
| Human interface input | Unknown |
| Item Weight | 191 g |
| Item model number | JZ90-54144-15 |
| OS | Android |
| Other display features | Wireless |
| Product Dimensions | 2.4 x 2.4 x 0.7 cm; 191 g |
| Special features | Activity Tracker |
| What’s in the box | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |

## 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 Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit - Image 1](https://m.media-amazon.com/images/I/41-RNLQI8EL.jpg)
![Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit - Image 2](https://m.media-amazon.com/images/I/411GgJnheFL.jpg)
![Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit - Image 3](https://m.media-amazon.com/images/I/413jvMGUNQL.jpg)
![Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit - Image 4](https://m.media-amazon.com/images/I/414AOMY+IfL.jpg)
![Oura Ring 4 - Black - Size 15 - Smart Sleep Tracking Wearable | Up to 8 Days Battery Life | Heart Rate & Fitness Tracker - Size First with Oura Ring 4 Sizing Kit - Image 5](https://m.media-amazon.com/images/I/414w7lsH0gL.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

### ⭐⭐⭐⭐⭐ So So Happy!
*by M***D on 18 October 2025*

I hesitated for a while before investing in this gadget. And I love my Gadgets! but after doing some homework on the competition, I decided to jump for it. First, the fit and metal colour are great, I couldn't be happier, the quality and durability is insane, i do everything with it, I rarely take it off. The connectivity to my Samsung Z Fold6 was flawless, no hiccups, plus, everything you open the app, it updates in no time. so great compatibility. Now, you need to give it time to gather data about you, of course... it will not happen overnight which is quite right, but the intel you get afterwards is great. Your body age, sleep quality, energy available, your stress, it is such a great little ring. it is a lot of money for such a small device but the value for money is worth it. I highly recommend it if you are curious and want to be nudge in the right direction for better health.

### ⭐⭐⭐⭐⭐ Wonderful
*by L***A on 17 December 2025*

Amazing! The price was excellent, the quality is great, it tracks my sleep, my meals, my daily activity and it looks elegant and sleek. You can wear it for days and the battery lasts a lot. The best Christmas present!

### ⭐⭐⭐⭐⭐ A great tool which does exactly what it says.
*by T***P on 12 December 2025*

The app is brilliant. It takes a while to get to know you, so don't expect instant insights, but as it builds a picture it is really good at telling you what's going on. I am using it to track my food etc as well, so not exclusively related to what's happening on the ring. On the ring specifically? Well, it is chunkier than a ring you'd buy as jewellery. That's ok and it's not ridiculous, but you have to get used to it. I do find I take it off and put it on more, or change fingers, as my hand needs a rest. The colour... Despite the name stealth, does stand out. If you want something more subtle then brushed or silver is probably better, as it's more like typical jewellery. That being said, I've gotten used to it. Sizing - definitely get the sizing kit and wear not for a few mins but for a day or two to understand how your fingers change size. Battery life is good. I reckon 8 charge it once every 4 otlr 5 days so far. I understand turning off blood oxygen measuring is the way to really eek out more battery life. You can also use airplane mode to reduce how often it speaks to your phone. But yeah, no regrets, it's a great tool and honestly, easier to live with than a smart watch.

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.uy/products/698086829-oura-ring-4-black-size-15-smart-sleep-tracking-wearable](https://www.desertcart.uy/products/698086829-oura-ring-4-black-size-15-smart-sleep-tracking-wearable)

---

*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-03-02*