Skip to content

Product Details

Product Specification

Details

Sensors

Red and infrared LEDs for blood oxygen levels; green and infrared LEDs for heart rate, heart rate variability, and respiration rate; digital temperature sensor; accelerometer for movement and activity tracking

Compatibility

iOS and Android; Oura App available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, and Danish

Measurement Units

Metric and imperial

App Integration

Integrates with 40+ apps

Width

7.90 mm

Thickness

3.51 mm

Weight

5.1–8.1 g, depending on ring size

Battery Life

5–8 days*

Charging Time

Typically 20–80 minutes, depending on battery level

Exterior Material

High-performance zirconia ceramic

Interior Material

Seamless titanium

Water Resistance

Up to 100 m / 328 ft

Scratch Resistance

Minor scratches from regular wear are normal; scuffs from contact with metal objects may be erasable

Connectivity

Bluetooth Low Energy

Firmware Updates

Automatic updates via the Oura App

EMF Safety

EMF-safe

Airplane Mode

Supported

Certification

FCC-certified

Battery life may vary depending on usage and other factors.

  • Oura Ring 4 Ceramic
  • Size-specific Charger
  • USB-C Cable
  • 1 Year Warranty | Human Error Not Covered

The exterior of Oura Ring 4 Ceramic is made of ceramic zirconia, whereas Oura Ring 4 exterior is made of titanium. With Oura Ring 4 Ceramic, there is a slight increase in thickness due to the material properties, and to ensure the product is durable and strong.

Oura Ring 4 Ceramic is made from high-performance zirconia ceramic, a premium material selected for its scratch resistance, luster, and color. Due to its hardness, it can scuff and take on the color of softer metals, like a dumbbell or kettle handle. It’s important to properly clean and care for your Oura Ring 4 Ceramic, so you can keep it looking like new.

Oura Ring is water-resistant up to 100 meters (~330 feet), meaning that you can wear it while showering, swimming, or partaking in recreational diving (e.g. snorkeling), but we don’t recommend using your Oura Ring while scuba diving or keeping it submerged underwater for over 12 hours. Chlorine will not damage it.

Oura Ring operating temperature ranges from -10–52°C / 14–125°F. You can safely wear your Oura Ring in the shower, hot tubs, saunas, ice baths, and cryotherapy tanks. However, extended exposure to extreme temperatures (below -20°C / -4°F or above 60°C / 140°F) may lead to battery damage.