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 Matte black
No current offers
Saved product information may be incomplete. Check the selected variant and package contents; availability elsewhere is not verified.
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, depending on ring size and lifestyle
- Charging time: usually 20–80 minutes, depending on battery charge level
- Waterproof up to 100 m / 328 ft
- Hypoallergenic titanium on the inner and outer surfaces, with a seamless titanium inner finish
- Tracks blood oxygen, heart rate, heart rate variability, respiratory rate, temperature trends, movement and activity; measurement details and around-the-clock tracking vary by sensor as specified
- Width: 7.90 mm; thickness: 2.88 mm
- Weight: 3.3–5.2 g, depending on Oura ring size
- Bluetooth Low Energy; Oura app available for iOS and Android
- Integrates with more than 40 apps; automatic firmware updates through the Oura app; supports flight mode; FCC certified
General specs
- Brand: Oura
- Model: Oura Ring 4
- Seller: re:Store
- ID: 4653504
- Size: 08 (18.2)
- Brand: OURA
- Width: 7.90 mm
- Weight: 3.3–5.2 g, depending on Oura ring size
- Material: Hypoallergenic titanium on the inner and outer surfaces; seamless titanium inner finish
- Thickness: 2.88 mm
- Model Name: Oura Ring 4
- Flight Mode: Supports flight mode
- Battery Life: 5–8 days, depending on ring size and lifestyle
- Connectivity: Bluetooth Low Energy
- Product Type: Smart ring
- Certification: FCC certified
- Charging Time: Usually 20–80 minutes, depending on battery charge level
- Compatibility: Oura app available for iOS and Android
- App integrations: Integrates with more than 40 apps
- Firmware updates: Automatic firmware updates through the Oura app
- Water Resistance: Waterproof up to 100 m / 328 ft
- Sensors and tracking: Red and infrared LEDs measure blood oxygen; green and infrared LEDs alternate to measure heart rate, heart rate variability and respiratory rate around the clock; a digital sensor measures temperature trends; an accelerometer tracks movement and activity around the clock
- First listed by seller: October 20, 2026
Smart ring with hypoallergenic titanium on its inner and outer surfaces and a seamless titanium inner finish. Red and infrared LEDs measure blood oxygen; green and infrared LEDs alternate to measure heart rate, heart rate variability and respiratory rate around the clock. A digital sensor measures temperature trends, and an accelerometer tracks movement and activity around the clock.
Battery life is 5–8 days depending on ring size and lifestyle. Charging usually takes 20–80 minutes depending on battery charge level. Waterproof up to 100 m / 328 ft.
When this device makes sense
Product confidence
Reviews
There are no text reviews yet. If you have experience using this product, please leave a review. It will help other people decide whether this product is right for them.