Sleep Wearable Form Factor
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Oura Oura Ring 4 Black
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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.
Features
- Battery life: 5–8 days per ring, depending on ring size and lifestyle.
- Charging time: usually 20–80 minutes, depending on the battery charge level.
- Waterproof up to 100 m/328 ft.
- Width: 7.90 mm; thickness: 2.88 mm.
- Weight: 3.3–5.2 g, depending on ring size.
- Red and infrared LEDs measure blood oxygen levels; green and infrared LEDs alternate to 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.
- Bluetooth Low Energy; available for iOS and Android; integrates with more than 40 apps.
- Supports metric and imperial units, automatic firmware updates through the Oura app, and airplane mode.
- Hypoallergenic titanium on inner and outer surfaces, with a seamless titanium inner finish; FCC certified. Described as safe for electromagnetic fields.
- The Oura Membership program works with the ring to provide personalized recommendations based on body data; membership inclusion is not specified.
General specs
- Brand: Oura
- Model: Oura Ring 4
- Seller: re:Store
- ID: 4653536
- Size: 09 (19)
- Brand: OURA
- Width: 7.90 mm.
- Weight: 3.3–5.2 g, depending on ring size.
- Materials: Hypoallergenic titanium on the inner and outer surfaces; seamless titanium inner finish.
- Thickness: 2.88 mm.
- Model Name: Oura Ring 4
- Battery Life: 5–8 days per ring, depending on ring size and lifestyle.
- Connectivity: Bluetooth Low Energy.
- Product Type: Smart ring
- Airplane mode: Supports airplane mode.
- Certification: FCC certified.
- Charging Time: Usually 20–80 minutes, depending on the battery charge level.
- Oura Membership: The Oura Membership program works with the ring to provide personalized recommendations based on body data; membership inclusion is not specified.
- App integrations: Integrates with more than 40 apps.
- Firmware updates: Firmware updates automatically through the Oura app.
- Water Resistance: Waterproof up to 100 m/328 ft.
- Temperature sensing: A digital sensor measures temperature trends.
- Blood oxygen sensing: Red and infrared LEDs measure blood oxygen levels.
- Measurement units supported: Metric and imperial units.
- Electromagnetic field safety: Described as safe for electromagnetic fields.
- Motion and activity tracking: An accelerometer tracks movement and activity around the clock.
- Mobile platform compatibility: Available for iOS and Android.
- Heart rate, heart rate variability, and breathing rate sensing: Green and infrared LEDs alternate to measure heart rate, heart rate variability, and breathing rate around the clock.
- First listed by seller: October 20, 2026
Smart ring in Black, size 09 (19), with a stated battery life of 5–8 days per ring depending on ring size and lifestyle. Charging usually takes 20–80 minutes, depending on battery charge level.
It measures blood oxygen, heart rate, heart rate variability, breathing rate, and temperature trends, and tracks movement and activity. Waterproof up to 100 m/328 ft; made with hypoallergenic titanium on the inner and outer surfaces.
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