Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
Oura Ring 4 Smart Ring
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Oura Oura Ring 4 Silver
Last known price: RUB 30,990.00 (RUB)
Price source: re:Store
Price record dated 10/20/26
Saved price in the source currency; not a current offer. The date refers to the price record, not a stock check.
Product details
General specs
- Brand: Oura
- Model: Oura Ring 4
- Materials: Hypoallergenic titanium on the inner and outer surfaces; seamless titanium inner finish
- Ring width: 7.90 mm
- Ring weight: 3.3–5.2 g, depending on ring size
- Connectivity: Bluetooth Low Energy
- Airplane mode: Supported
- APP Languages: English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, and Danish
- Certification: FCC certified
- Ring thickness: 2.88 mm
- App integrations: Integrates with more than 40 apps
- Firmware updates: Automatic through the Oura app
- Water Resistance: Up to 100 m / 328 ft
- Normal-use scratches: Minor scratches from normal use are described as normal
- App measurement units: Metric and imperial units
- Typical charging time: 20–80 minutes, depending on battery charge level
- Sensors and measurements: Red and infrared LEDs measure blood oxygen; green and infrared LEDs alternately measure heart rate, heart rate variability, and breathing rate around the clock; a digital sensor measures temperature trends; an accelerometer tracks movement and activity around the clock
- Electromagnetic field safety: Described as safe for electromagnetic fields
- Ring battery life per charge: 5–8 days, depending on ring size and lifestyle
- Mobile operating system compatibility: iOS and Android
Oura Ring 4 is a smart ring that tracks health and activity metrics using optical LEDs, a temperature sensor, and an accelerometer. Battery life is stated as 5–8 days depending on ring size and lifestyle; typical charging time is 20–80 minutes depending on charge level.
