Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
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 runtime per charge: 5–8 days, depending on ring size and lifestyle.
- Charging time: usually 20–80 minutes, depending on battery charge level.
- Water resistance: up to 100 m / 328 ft.
- Hypoallergenic titanium on the inner and outer surfaces, with a seamless titanium inner finish.
- Width: 7.90 mm; thickness: 2.88 mm.
- Weight: 3.3–5.2 g, depending on ring size.
- Sensors measure blood oxygen, heart rate, heart rate variability, breathing rate, temperature trends, and activity.
- Available for iOS and Android; Bluetooth Low Energy connection.
- Integrates with more than 40 apps.
- Firmware updates automatically through the Oura app; supports airplane mode.
- Minor scratches from normal use are normal.
General specs
- Brand: Oura
- Model: Oura Ring 4
- Seller: re:Store
- ID: 4653540
- Size: 07 (17,3)
- Brand: OURA
- Width: 7.90 mm.
- Weight: 3.3–5.2 g, depending on ring size.
- Material: 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.
- App integrations: Integrates with more than 40 apps.
- Firmware updates: Firmware updates automatically through the Oura app.
- Water Resistance: Up to 100 m / 328 ft.
- App Compatibility: Available for iOS and Android.
- Health measurements: Sensors measure blood oxygen, heart rate, heart rate variability, breathing rate, temperature trends, and activity.
- Wireless connection: Bluetooth Low Energy.
- Normal-use scratches: Minor scratches from normal use are normal.
- Battery runtime per charge: 5–8 days, depending on ring size and lifestyle.
- First listed by seller: October 20, 2026
Smart ring with sensors that measure blood oxygen, heart rate, heart rate variability, breathing rate, temperature trends, and activity. It has hypoallergenic titanium inner and outer surfaces and a seamless titanium inner finish.
- Battery runtime per charge: 5–8 days, depending on ring size and lifestyle.
- Water resistance: up to 100 m / 328 ft.
- Width: 7.90 mm; thickness: 2.88 mm; weight: 3.3–5.2 g, depending on ring size.
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