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 14 (23.1), Matte Black Smart Ring, Matte Black, Size 14 (23,1)
Available offers (21)
Current
Size 14 (23.1), Matte Black
re:Store
RUB 36,990.00
Available to order
Features
- Battery runtime: 5–8 days, depending on ring size and lifestyle.
- Charging time is usually 20–80 minutes, depending on battery charge level.
- Water resistance rating: up to 100 m/328 ft.
- Red and infrared LEDs measure blood oxygen level; 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.
- Available for iOS and Android; integrates with more than 40 apps via Bluetooth Low Energy.
- Hypoallergenic titanium on the inner and outer surfaces. Minor scratches from normal use are normal.
General specs
- Brand: Oura
- Model: Oura Ring 4
- Seller: re:Store
- ID: 4659128
- Size: 14 (23,1)
- 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
- Thickness: 2.88 mm
- Model Name: Oura Ring 4
- Product Type: Smart ring
- Charging Time: Usually 20–80 minutes, depending on battery charge level
- Battery Runtime: 5–8 days, depending on ring size and lifestyle
- Normal-use wear: Minor scratches from normal use are normal
- App integrations: Integrates with more than 40 apps
- Wireless connection: Bluetooth Low Energy
- Temperature Measurement: A digital sensor measures temperature trends
- Water Resistance Rating: Up to 100 m/328 ft
- Blood Oxygen Measurement: Red and infrared LEDs measure blood oxygen level
- App platform compatibility: Available for iOS and Android
- Movement and activity tracking: An accelerometer tracks movement and activity around the clock
- Heart and breathing measurements: 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 36,990.00
Last price update: 10/20/26
Available to order
Shipping options
Delivery to 
Russia
Russia
Available
A matte black smart ring with a 7.90 mm width, 2.88 mm thickness, and weight of 3.3–5.2 g depending on ring size. Battery runtime is 5–8 days depending on ring size and lifestyle. It measures blood oxygen, heart rate, heart rate variability, breathing rate, temperature trends, movement, and activity.
Similar products comparison
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Oura Oura Ring 4 Matte black
|
Oura Ring 5 Matte silver
|
Oura Ring 5 Matte silver
|
Oura OURA 5 Black
|
Oura Ring 5 black
|
Oura Ring 5 Matte 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 36,990.00 | RUB 75,990.00 | RUB 75,990.00 | RUB 65,990.00 | 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 | 14 (23,1) | 09 (19) | 11 (20,6) | 07 (17,3) | 08 (18.2) | 08 (18,2) |
| Model Name | Oura Ring 4 | Ring 5 | Ring 5 | OURA 5 | Ring 5 | Ring 5 |
| Product Type | Smart ring | Smart ring | Smart ring | Smart ring | smart ring | Smart ring |
| 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 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. | |
| Blood Oxygen Measurement | Red and infrared LEDs measure blood oxygen level | Red and infrared LEDs measure blood oxygen levels. | Red and infrared LEDs measure blood oxygen levels. | |||
| 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. | An accelerometer tracks movement and activity around the clock. | ||
| Airplane mode | Supports airplane mode. | Supports airplane mode. | Supports airplane mode. | Supports airplane mode. | ||
| Compatibility | Available for iOS and Android. | Available for iOS and Android. | Available for iOS and Android. | |||
| 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. | Firmware updates automatically through the Oura app. | |
| Water Resistance | Up to 100 m/328 ft. | Waterproof up to 100 m/328 ft; IP68 water and dust protection. | Up to 100 m/328 ft. | Up to 100 m/328 ft; IP68-rated for water and dust. | ||
| 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 protection against water and dust. | IP68 for water and dust. | |||
| 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 Matte black
RUB 36,990.00
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.