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 Size 13 (22.2), Silver Smart Ring 4, size 13 (22,2)
Available offers (21)
Current
Size 13 (22.2), Silver
re:Store
RUB 30,990.00
Available to order
Features
- Battery life per ring charge: 5–8 days, depending on ring size and lifestyle
- Charging time: usually 20–80 minutes, depending on battery charge level
- Measures blood oxygen, heart rate, heart rate variability, breathing rate, temperature trends, movement, and activity
- Hypoallergenic titanium on inner and outer surfaces, with a seamless titanium inner finish
- Waterproof up to 100 m/328 ft
- Width: 7.90 mm; thickness: 2.88 mm; ring weight: 3.3–5.2 grams, depending on ring size
- Bluetooth Low Energy; compatible with iOS and Android
- Integrates with more than 40 apps; supports metric and imperial units
- Oura Membership provides personalized recommendations and supports long-term health goals and habits
- Described as safe for electromagnetic fields; airplane mode supported; FCC certified
- Minor scratches from normal use are described as normal
General specs
- Brand: Oura
- Model: Oura Ring 4
- Seller: re:Store
- ID: 4659548
- Size: 13 (22,2)
- Brand: OURA
- Width: 7.90 mm
- Material: Hypoallergenic titanium on the inner and outer surfaces; seamless titanium inner finish
- Thickness: 2.88 mm
- Model Name: Oura Ring 4
- Ring weight: 3.3–5.2 grams, depending on ring size
- Connectivity: Bluetooth Low Energy
- Measurements: Red and infrared LEDs measure blood oxygen; green and infrared LEDs alternately 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
- Product Type: Smart ring
- Airplane mode: Supported
- Charging Time: Usually 20–80 minutes, depending on battery charge level
- App integrations: Integrates with more than 40 apps
- Water Resistance: Waterproof up to 100 m/328 ft
- FCC certification: Certified by FCC
- Membership service: Oura Membership works with the ring to provide personalized recommendations and support long-term health goals and habits
- Normal-use scratching: Minor scratches from normal use are described as normal
- Compatible mobile platforms: iOS and Android
- Battery life per ring charge: 5–8 days, depending on ring size and lifestyle
- Electromagnetic field safety: Described as safe for electromagnetic fields
- Supported measurement systems: Metric and imperial units
- 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
Silver smart ring with titanium inner and outer surfaces. Red and infrared LEDs measure blood oxygen; green and infrared LEDs alternately measure heart rate, heart rate variability, and breathing rate around the clock. A digital sensor measures temperature trends, and an accelerometer tracks movement and activity around the clock.
Similar products comparison
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Oura Oura Ring 4 Silver
|
Oura Ring 5 Matte silver
|
Oura Ring 5 Matte silver
|
Oura OURA 5 Black
|
Oura Ring 5 Rose gold
|
Oura Ring 5 Silver
|
|
| Brand | Oura | Oura | Oura | Oura | Oura | Oura |
| Model | Oura Ring 4 | Ring 5 | Ring 5 | OURA 5 | Ring 5 | Ring 5 |
| Color |
|
|
|
|
|
|
| Price | RUB 30,990.00 | RUB 75,990.00 | RUB 75,990.00 | RUB 65,990.00 | RUB 75,990.00 | RUB 65,990.00 |
| 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 | 13 (22,2) | 11 (20,6) | 09 (19) | 07 (17,3) | 11 (20,6) | 10 (19,8) |
| Model Name | Oura Ring 4 | Ring 5 | Ring 5 | OURA 5 | Ring 5 | Ring 5 |
| Connectivity | Bluetooth Low Energy | Bluetooth Low Energy; firmware updates automatically through the Oura app. | Bluetooth Low Energy. | |||
| Product Type | Smart ring | Smart ring | Smart ring | Smart ring | Smart ring | Smart ring |
| Airplane mode | Supported | Supports airplane mode. | Supports airplane mode. | Supports airplane mode. | ||
| Charging Time | Usually 20–80 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. | 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. | |
| Water Resistance | Waterproof up to 100 m/328 ft | Waterproof up to 100 m/328 ft; IP68 water and dust protection. | Up to 100 m/328 ft. | |||
| Electromagnetic field safety | Described as safe for electromagnetic fields | Described as safe for electromagnetic fields. | Described as safe for electromagnetic fields. | |||
| Materials | High-performance titanium body with seamless titanium interior finish. | High-performance titanium body with a seamless titanium inner finish. | High-performance titanium body with a seamless titanium inner finish. | |||
| Compatibility | Available for iOS and Android. | Available for iOS and Android. | Available for iOS and Android. | Available for iOS and Android; compatible with the Oura app. | Available for iOS and Android; integrates with more than 100 apps. | |
| Firmware updates | Automatic firmware updates 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. | ||
| Manufacturer warranty | Manufacturer warranty is indicated; no term is stated. | Indicated as available. | Available. | Yes; term not specified. | ||
| Measurement Units | Supports metric and imperial units. | Supports metric and imperial units. | Supports metric and imperial units. | |||
Oura Oura Ring 4 Silver
RUB 30,990.00
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.