Trace the subtle shifts in your body’s symphony, from alpine ascents to quiet reflections, with the Oura Ring 4. This isn't just a tracker; it's a silent partner, meticulously charting your sleep architecture, readiness score, and activity levels with refined accuracy, allowing you to fine-tune your approach to every day. Its advanced sensors now capture precise workout heart rates and critical blood oxygen saturation during rest, revealing deeper insights into your recovery and overall resilience. Crafted by Oura from aerospace-grade titanium, slimmed down for ultimate comfort and boasting a week-long battery life, it’s waterproof to 100 meters – ready for spontaneous plunges or persistent rain. Oura empowers you to navigate your internal landscape with the same informed confidence you bring to exploring the world’s wild places, making proactive health an effortless part of your adventure.  
  
PRODUCT CONDITION 
  
This UnNew Oura Ring 4 is in Excellent condition.  
  
Products in Excellent condition have seen minimal use and wear. Any imperfections are purely cosmetic and do not affect the intended performance of the product.    



TECH SPECS

• Brand: Oura
• Ring material: Titanium
• Connectivity: Bluetooth
• Battery life: 5-8 days
• Water resistance: Up to 100m
• Processor: Nordic nRF52840
• On-board data storage: 30 days
• Sensors: Green LEDs (heart rate, SpO2), Red LED (SpO2), Infrared LEDs (heart rate), NTC temperature sensors, 3D accelerometer
• Included component: Oura USB-C Charging Dock, USB -C cord.
• Unable to fully test. Turns on when on charging dock