Oura Ring 4 Ceramic Midnight (Includes Free Size Kit)
Choosing the right Oura Ring size is essential for comfort and accurate readings.
After placing your order, our team will ship out the free size kit to your address. Simply contact us on WhatsApp. once you confirm your preferred size, we will ship the product within 15 days. this part of the process is complimentary free of charge.
The Oura Ring 4 Ceramic Midnight is a sleek health tracker with a durable ceramic finish. It offers comprehensive insights into your sleep activity heart rate and body temperature. This advanced smart ring provides personalized readiness scores to optimize your daily wellbeing. Its elegant design and cutting edge technology make it the perfect discreet wearable.
Sensors
- Red and infrared LEDs measure blood oxygen levels
- Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate
- Digital sensor measures temperature trends
- Accelerometer tracks movement and activity 24/7
Compatibility
- Oura App is available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, and Danish
- Supports metric and imperial units of measurement
- Integrates with 40+ apps
- Available on iOS and Android
Weight and Dimensions
- Width: 7.9 mm
- Thickness: 3.51 mm (similar to a wedding band)
- Weight: 5.1 - 8.1 g (depending on ring size)
Battery Life
- 5-8 days of battery life
- Typically charges in 20-80 minutes, depending on battery level
Quality Materials
- High-performance zirconia ceramic exterior
- Seamless titanium interior
- Water resistant up to 100m/328 ft
- Minor scratches from regular wear are normal
- Erasable scuffs may occur while handling metal objects
Connectivity
- Bluetooth Low Energy
- Automatic firmware updates via Oura App
- EMF-safe
- Supports airplane mode
- FCC-certified
In the Box
- Oura Ring 4 Ceramic
- Size-specific charger
- USB-C cable
- Ceramic Polishing Pad