Click to open expanded view

Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Stealth - (2024)

Price
$349.99
Taxes and shipping calculated at checkout
Condition: Eco-Save

Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Stealth - (2024)

Condition
Price
Excellent
$349.99
Sold out
Good
$349.99
Sold out
Eco-Save
$349.99
Compare product options
Only 1 left in stock!
American Express
Apple Pay
Diners Club
Discover
Google Pay
Mastercard
PayPal
Shop Pay
Visa

12 Month Warranty

on most devices

30-Day Money Back Guarantee

on every device

Fast Shipping

most orders ship same day

Description

 

Oura Ring 4 Smart Ring - Size 9 - Stealth

OVERVIEW

The Oura Ring 4 (Size 9, Stealth) is a sleek, ultra-lightweight biometric smart ring engineered to deliver round-the-clock health, activity, and sleep telemetry in a discreet, screen-free form factor. Powered by advanced Smart Sensing technology, this device dynamically adjusts to skin contact and movement to maintain continuous signal fidelity for heart rate, blood oxygen, body temperature, and recovery tracking. Encased in a durable all-titanium housing with a matte Stealth finish, it offers superior physical resilience and up to 8 days of battery longevity per charge. Fully tested and restored to 100% functional operation, this refurbished Grade C unit delivers high-tier biometric performance and exceptional fiscal value.

KEY FEATURES

  • Smart Sensing Technology: Dynamically adapts to physiological baseline changes to deliver 24/7 continuous heart rate, SpO2, and sleep quality telemetry.
  • All-Titanium Stealth Finish: Built with an ultra-durable titanium outer casing and a seamless interior designed for water resistance up to 100 meters.
  • Extended Battery Life: Delivers up to 8 days of continuous operational runtime on a single charge with rapid inductive magnetic docking.
  • Screen-Free Ergonomic Design: Eliminates distracting displays and vibrations, allowing seamless focus while continuously gathering actionable biometrics.

SPECIFICATIONS

Device Type Activity Tracker / Smart Wearable Ring
OS Version None (Syncs via Oura App for iOS & Android)
Processor / CPU Custom Smart Sensing Signal Processing Engine
RAM Size + Type Embedded Microcontroller Memory
Storage Onboard Flash Memory (Local Data Buffering)
Screen / Display None (Screen-Free Architectural Design)
Touch Screen No
Color Stealth (Size 9)
Battery Integrated Rechargeable Lithium-Ion (Up to 8 Days Battery Life)
Hardware Upgradeability Rating Non-Upgradable - Factory-sealed titanium architecture rated to 100m water resistance
Memory Upgradeability Non-Upgradable - Integrated system architecture
Storage Upgradeability Non-Upgradable - Fixed onboard flash controller
Physical Ports & Expansion None (Utilizes magnetic inductive wireless charging dock)

CONNECTIVITY

  • Bluetooth Low Energy: Low-power wireless telemetry link for data sync with companion smartphones.
  • Application Ecosystem Sync: Native compatibility with iOS and Android via Oura App, supporting 40+ platforms like Apple Health and Strava.

WHAT'S INCLUDED

  • Oura Ring 4 Smart Ring (Size 9 - Stealth)
  • Charging Dock with Cable

DOES NOT INCLUDE

  • AC Wall Power Adapter
  • Original Packaging

CONDITION

  • This is a refurbished product. It has been inspected, tested, and restored to full working condition. Visible cosmetic signs of wear, such as scratches or scuffs on the outer titanium finish, are present. These cosmetic flaws do not impact performance or biometric tracking accuracy. Devices will have some variation in appearance.
See Specifications
Brand R3NEW
Title Oura - Ring 4 - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 9 - Stealth - (2024)
Model JZ90-54218-09
Color Stealth

FAQ

What kind of warranty/guarantee do you offer?

At R3NEW, most transactions are backed by a 1-year warranty, covering technical defects and malfunctions, while every purchase includes a 30-day guarantee. Our warranty is designed to give you peace of mind, ensuring the reliability and longevity of your device.

What's the difference between the conditions? (Excellent, Good, EcoSave)

Great question! Let us break down the difference.

Excellent: Our Excellent condition devices offer a pristine user experience that rivals new units, boasting a flawless appearance with no visible scratches on the display or body. Each device undergoes rigorous testing to ensure it operates like new, giving you peace of mind with a full year of warranty coverage. It’s an ideal choice for those seeking near-new quality without the brand-new price tag

Good: Devices in Good condition are a great compromise between cost and quality. You might find a few minor scratches or slight nicks on the body or display, but these are purely cosmetic and don’t affect the device’s operation. We suggest using a case to bring its external appearance closer to 'like new.' Rest assured, every device meets our strict functional standards and comes with a one-year warranty for functionality

EcoSave: Opt for our EcoSave condition if you want to maximize value while minimizing environmental impact. These devices show visible signs of use, such as scratches or dents, which are purely cosmetic and can often be concealed with a case. Each device has passed our comprehensive functional tests and is backed by a one-year warranty, ensuring it works perfectly for you while also being kind to the planet.

Can I trust R3NEW?

We've sold electronics for over 15 years and are one of top trusted sources of certified refurbished electronics. Plus, with a 30-day guarantee and 12 month warranty, you can shop with peace of mind. If you have any issues at all, just email our support team and we'll help you out.