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Oura Ring 4 Ceramic Smart Ring Size Before You Buy with OR4 Sizing Kit Size 10 Tide (2025)

Price
$229.99
Taxes and shipping calculated at checkout
Condition: Excellent

Oura Ring 4 Ceramic Smart Ring Size Before You Buy with OR4 Sizing Kit Size 10 Tide (2025)

Condition
Price
Excellent
$229.99
Good
$219.99
$229.99
Sold out
Eco-Save
$209.99
$229.99
Sold out
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12 Month Warranty

on most devices

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on every device

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most orders ship same day

Description


R3NEW

Certified Refurbished

EXCELLENT Refurbished

Overview

The Oura Ring 4 Ceramic in Tide offers advanced personal health, activity, and sleep tracking in a sleek, high-performance zirconia ceramic finish. Powered by Smart Sensing technology, it continuously monitors sleep stages, 24/7 heart rate, blood oxygen levels, temperature trends, and daily stress with precision accuracy. Designed for all-day wear and featuring up to 8 days of battery life, this smart ring seamlessly syncs with iOS and Android devices via the Oura App.

Key Features

  • Smart Sensing technology adapts to your finger for continuous, high-accuracy biometric monitoring.
  • Comprehensive tracking for sleep quality, 24/7 heart rate, heart rate variability (HRV), and blood oxygen (SpO2).
  • High-performance zirconia ceramic exterior with a smooth, durable, and lightweight finish.
  • Water resistant up to 100m (328 ft) and designed for continuous 24/7 wear.
  • Up to 8 days of battery life on a single charge.

Specifications

Brand Oura
Model Oura Ring 4 Ceramic
MPN JZ90-57461-10
Size 10
Color Tide
Material Zirconia Ceramic Exterior, Titanium Interior
Water Resistance 100m / 328 ft
Compatibility iOS & Android

Connectivity

Bluetooth Low Energy

What's Included

(1) Oura Ring 4 Ceramic — Size 10 — Tide

(1) Oura Ring 4 Charging Dock & USB-C Cable

Does Not Include Default Packages

Original retail packaging

Items not expressly listed in the What's Included section.

Condition Specifics

EXCELLENT CONDITION — The item is in like-new condition, it has been professionally inspected, cleaned, and refurbished by the manufacturer or a manufacturer-approved vendor to meet manufacturer specifications. The item will be in original packaging or new packaging, with original or new authentic accessories.

Disclaimer

This is a refurbished product. It has been inspected, tested, and restored to full working condition. Minor cosmetic imperfections may be present. Devices will have some variation in appearance. The photos shown are example images representing the typical condition of the model listed.

Warehouse Quality Statement

All units are fully tested and verified according to our internal quality standards. We do not open devices during our inspection or refurbishment process, and no internal components (such as batteries, screens, hard drives, etc.) are replaced.
See Specifications
Brand R3NEW
Title Oura Ring 4 Ceramic Smart Ring Size Before You Buy with OR4 Sizing Kit Size 10 Tide (2025)
Model JZ90-57461-10
Color Tide

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.