Sleep Wearable Form Factor
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Oura Oura Ring 4 Matte silver
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Last known price: RUB 36,990.00 (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 runtime: 5–8 days, depending on ring size and lifestyle.
- Charging time: usually 20–80 minutes, depending on battery charge level.
- Hypoallergenic titanium on the inner and outer surfaces; seamless titanium inner finish.
- Water-resistant 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 alternately measure heart rate, heart rate variability, and breathing rate around the clock.
- Digital sensor measures temperature trends; accelerometer tracks movement and activity around the clock.
- Bluetooth Low Energy; Oura app 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.
- FCC certified; described as safe for electromagnetic fields. Minor scratches from normal use are described as normal.
General specs
- Brand: Oura
- Model: Oura Ring 4
- Seller: re:Store
- ID: 4659140
- Size: 13 (22,2)
- 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
- Product Type: Smart ring
- Airplane mode: Supports airplane mode.
- Charging Time: Usually 20–80 minutes, depending on battery charge level.
- Battery Runtime: 5–8 days, depending on ring size and lifestyle.
- App integrations: Integrates with more than 40 apps.
- Firmware updates: Firmware updates automatically through the Oura app.
- Water Resistance: Water-resistant up to 100 m / 328 ft.
- FCC certification: FCC certified.
- Measurement Units: Supports metric and imperial units.
- Wireless connection: Bluetooth Low Energy.
- Normal-use scratching: Minor scratches from normal use are described as normal.
- Temperature Measurement: A digital sensor measures temperature trends.
- Blood Oxygen Measurement: Red and infrared LEDs measure blood oxygen levels.
- Mobile App Compatibility: The Oura app is available for iOS and Android.
- Electromagnetic field safety: Described as safe for electromagnetic fields.
- Movement and activity tracking: An accelerometer tracks movement and activity around the clock.
- Heart and breathing measurements: Green and infrared LEDs alternately measure heart rate, heart rate variability, and breathing rate around the clock.
- First listed by seller: October 20, 2026
Smart ring with hypoallergenic titanium on the inner and outer surfaces and a seamless titanium inner finish. It measures blood oxygen, heart rate, heart rate variability, breathing rate, temperature trends, movement, and activity. Battery runtime is 5–8 days, depending on ring size and lifestyle.
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