Oura Ring 4 Ceramic | Smart Rings

Oura Ring 4 Ceramic pairs a wearable ring with the Oura App to help you follow sleep, daily activity and recovery. Choose a finish and the correct Oura size for a comfortable daily fit.

Details

Optical sensors track heart rate, heart-rate variability and blood oxygen. A temperature sensor follows temperature trends, while an accelerometer records movement.

Specifications

Materials	Zirconia ceramic exterior; titanium interior
Width	7.90 mm
Thickness	3.51 mm
Weight	5.1–8.1 g, depending on size
Battery life	5–8 days, depending on size and usage
Charging time	20–80 minutes, depending on battery level
Water resistance	100 m / 328 ft
Connectivity	Bluetooth Low Energy; airplane mode
Compatibility	Oura App for iOS and Android
Sizes	4–15; Oura sizing

In the box

Oura Ring 4 Ceramic, size-specific charger and USB-C cable; ceramic polishing pad.

Before you order

An Oura Membership is required for full app functionality and is purchased separately. Use the sizing kit for this generation; Oura sizes differ from standard jewelry sizes.