Product Description

Overview

Experience Oura's most advanced smart ring with the Oura Ring 4 in elegant Rose Gold — Size 4. The Oura Ring 4 is the world's most capable smart ring — delivering continuous heart rate monitoring, blood oxygen (SpO2), skin temperature, sleep staging, Readiness Score, activity tracking, and women's cycle insights from a lightweight, discreet titanium ring form factor with no display. Up to 8 days of battery life, 100-metre water resistance, and Oura's industry-leading sleep science make the Ring 4 the most comprehensive and wearable everyday health tracker available. Please note: full Oura Ring health features require an active Oura Membership subscription (available monthly or annually — not included). Please also confirm ring sizing carefully before purchasing — Size 4 is a very small ring size suitable for slim fingers. Oura recommends using the OR4 Sizing Kit to confirm fit before committing to a size.

Key Features

• Comprehensive Health Tracking in a Ring: Continuous heart rate, SpO2, skin temperature, sleep staging, Readiness Score, activity, stress, and women's cycle tracking — all from a discreet, lightweight titanium ring with no display.
• Industry-Leading Sleep Science: Oura's advanced sleep staging and Readiness Score deliver the most detailed and actionable everyday sleep and recovery insights available in any wearable form factor.
• Up to 8-Day Battery Life: Exceptional multi-day battery endurance for up to 8 days of continuous health tracking without needing to remove or charge the ring daily.
• 100-Metre Water Resistance: Fully waterproof to 100 metres for swimming, showering, and all everyday water activities without any need to remove the ring.
• Titanium Construction — Rose Gold: Premium titanium ring construction with a Rose Gold PVD finish for a durable, hypoallergenic, and elegantly understated everyday look.
• Discreet No-Display Design: No screen, no notifications, no distraction — the Oura Ring 4 tracks continuously in the background and syncs insights to the Oura app when convenient.

Specifications

Connectivity

• Bluetooth 5.3
• Magnetic Charging

What's Included

• (1) Oura Ring 4 — Size 4 — Rose Gold
• (1) Magnetic Charging Cable

Does Not Include Default Packages

• Original Box
• Oura Membership Subscription (required for full features — sold separately)
• OR4 Sizing Kit

Condition Specifics

Good Refurbished — Good Condition: Professionally inspected, fully tested, and restored to 100% functionality. Ring surface shows moderate signs of cosmetic wear from normal use (such as surface scratches or scuffs). All sensors and functionality are fully operational, and performance is completely unaffected.

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 or sensors) are replaced. Please note: full Oura Ring health features require an active Oura Membership subscription (not included). Ring sizing is critical — Size 4 is a very small ring size; Oura strongly recommends confirming fit with the OR4 Sizing Kit before purchasing a specific size.