---
product_id: 719399116
title: "Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life"
brand: "oura"
price: "¥163123"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/719399116-ring-4-smart-ring-size-first-with-oura-ring-4
store_origin: JP
region: Japan
---

# 8 days battery life 30+ biometric sleep & health metrics Water resistant titanium design Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life

**Brand:** oura
**Price:** ¥163123
**Availability:** ✅ In Stock

## Summary

> 💍 Elevate your wellness game — the future of smart rings is here.

## Quick Answers

- **What is this?** Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life by oura
- **How much does it cost?** ¥163123 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/719399116-ring-4-smart-ring-size-first-with-oura-ring-4)

## 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

- • **Exclusive Oura Membership:** Enjoy your first month free and unlock personalized insights with the Oura app community.
- • **Unmatched Battery Endurance:** Up to 8 days of uninterrupted tracking — stay connected to your health, not the charger.
- • **Comprehensive Health Insights:** Track 30+ biometrics including sleep, heart rate, stress, and women’s health with Smart Sensing tech.
- • **Precision Sizing Kit Included:** Get the perfect fit before you buy — no guesswork, just confidence.
- • **Sleek, Durable Titanium Build:** All-titanium, water resistant, and designed for 24/7 comfort — wear it anywhere, anytime.

## Overview

The Oura Ring 4 is a minimalist, all-titanium smart ring designed for continuous 24/7 health tracking. It monitors over 30 biometric signals including sleep, heart rate, and stress, powered by adaptive Smart Sensing technology. With up to 8 days of battery life and water resistance, it offers durable, comfortable wear without distractions. The purchase includes a sizing kit for a perfect fit and a free first month of Oura membership for personalized health insights.

## Description

Full description not available

## Features

- SIZE BEFORE YOU BUY - Oura Ring 4 sizes are different from standard ring sizes. Size yourself with the Oura Ring 4 Sizing Kit and receive a dh35.00 desertcart credit towards the future purchase of an Oura Ring 4.
- OURA MEMBERSHIP - First month of membership is free with your purchase, $6.99/mo afterwards. Offer available to new members only. Or opt for the annual prepaid option for $79.99. Membership is tied to your account via the Oura App, not your physical ring.
- ACCURACY - SMART SENSING - Oura tracks over 30 biometrics, including sleep, activity, stress, heart health, and women’s health metrics. Oura Ring 4 is powered by Smart Sensing, which adapts to you — delivering accurate, continuous data, day and night.
- LONG LASTING BATTERY - With up to 8 days of battery life, no screens and no vibrations, Oura Ring 4 allows you to focus on the present. From a workout to a night out — you’re free to forget it’s on. Until you start getting compliments.
- DESIGNED FOR 24/7 WEAR - The updated design of the Oura Ring 4 is more comfortable, fits better than ever, and is water resistant. The first all-titanium smart ring combines exceptional durability with a gentle touch, even for sensitive skin.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Age Range | Adult |
| Color | Rose Gold |
| Size | 8 |
| Style | Minimalist |
| Compatible with | Smartphone, Tablet |
| Display Type | No Display |
| Shape | Round |
| Meter | Heart rate, sleep |
| Number of Items | 1 |
| Features | Activity Tracker |
| Included Components | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Batteries Included? | Yes |
| Brand | OURA |
| Manufacturer | Oura |
| Item model number | JZ90-54219-08 |
| Product Dimensions | 2.6 x 2.6 x 0.8 cm; 189.94 g |
| ASIN | B0D9WVM6DS |

## Product Details

- **Operating system:** Proprietäres Betriebssystem
- **Special features:** Activity Tracker
- **Battery capacity:** 144 Milliamp Hours
- **Connectivity technology:** Bluetooth
- **Wireless communication standard:** Bluetooth

## Images

![Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life - Image 1](https://m.media-amazon.com/images/I/51zKmnnZU8L.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 - Rose Gold - 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
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**Shop now:** [https://www.desertcart.jp/products/719399116-ring-4-smart-ring-size-first-with-oura-ring-4](https://www.desertcart.jp/products/719399116-ring-4-smart-ring-size-first-with-oura-ring-4)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-06*