Sleep Wearable Form Factor
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Oura Oura Ring 4 Size 09 (19), Black Smart Ring 4, Black, size 09 (19)
Available offers (21)
Current
Size 09 (19), Black
re:Store
RUB 30,990.00
Available to order
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
If you are interested in more details, you can find full information on the seller's page.
RUB 30,990.00
Last price update: 10/20/26
Available to order
Shipping options
Delivery to 
Russia
Russia
Available
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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| Brand | Oura | Oura | Oura | Oura | Oura | Oura |
| Model | Oura Ring 4 | Ring 5 | Ring 5 | Ring 5 | OURA 5 | Ring 5 |
| Color |
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| Price | RUB 30,990.00 | RUB 75,990.00 | RUB 65,990.00 | RUB 75,990.00 | RUB 65,990.00 | RUB 75,990.00 |
| Seller | re:Store | re:Store | re:Store | re:Store | re:Store | re:Store |
| Update | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 | Oct 26, 2026 |
| Size | 09 (19) | 09 (19) | 08 (18.2) | 11 (20,6) | 07 (17,3) | 08 (18,2) |
| Materials | Hypoallergenic titanium on the inner and outer surfaces; seamless titanium inner finish. | High-performance titanium body with seamless titanium interior finish. | High-performance titanium body with a seamless titanium inner finish. | |||
| Model Name | Oura Ring 4 | Ring 5 | Ring 5 | Ring 5 | OURA 5 | Ring 5 |
| Product Type | Smart ring | Smart ring | smart ring | Smart ring | Smart ring | Smart ring |
| Airplane mode | Supports airplane mode. | Supports airplane mode. | Supports airplane mode. | Supports airplane mode. | Supports airplane mode. | |
| Certification | FCC certified. | FCC certified. | FCC certified. | |||
| Charging Time | Usually 20–80 minutes, depending on the battery charge level. | About 80 minutes, depending on battery charge level. | About 80 minutes, depending on battery charge level. | About 80 minutes, depending on battery charge level. | About 80 minutes, depending on the battery charge level. | About 80 minutes, depending on the battery charge level. |
| App integrations | Integrates with more than 40 apps. | Integrates with more than 100 apps. | Integrates with more than 100 apps. | Integrates with more than 100 apps. | Integrates with more than 100 apps. | |
| Firmware updates | Firmware updates automatically through the Oura app. | Automatic firmware updates through the Oura app. | Firmware updates automatically through the Oura app. | Automatic firmware updates through the Oura app. | Firmware updates automatically through the Oura app. | Firmware updates automatically through the Oura app. |
| Water Resistance | Waterproof up to 100 m/328 ft. | Up to 100 m/328 ft. | Up to 100 m/328 ft. | Waterproof up to 100 m/328 ft; IP68 water and dust protection. | Up to 100 m/328 ft; IP68-rated for water and dust. | |
| Temperature sensing | A digital sensor measures temperature trends. | A digital sensor measures temperature trends. | A digital sensor measures temperature trends. | |||
| Electromagnetic field safety | Described as safe for electromagnetic fields. | Described as safe for electromagnetic fields. | Described as safe for electromagnetic fields. | |||
| Compatibility | Available for iOS and Android. | Available for iOS and Android. | Available for iOS and Android. | |||
| Manufacturer warranty | Indicated as available. | Manufacturer warranty is indicated; no term is stated. | Available. | Yes. | ||
| Wireless Connectivity | Bluetooth Low Energy. | Bluetooth Low Energy. | Bluetooth Low Energy. | Bluetooth Low Energy. | ||
| Ingress Protection Rating | IP68 for water and dust. | IP68 for water and dust. | IP68 protection against water and dust. | |||
| Movement and activity tracking | An accelerometer tracks movement and activity around the clock. | An accelerometer tracks movement and activity around the clock. | An accelerometer tracks movement and activity around the clock. | |||
| Battery Life per Charge | Up to 6–9 days on one charge, depending on ring size and usage intensity. | Up to 6–9 days per charge, depending on ring size and usage intensity. | Up to 6–9 days, depending on ring size and usage intensity. | |||
Oura Oura Ring 4 Black
RUB 30,990.00
When this device makes sense
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