# Smart Ring Oura Ring Ultrahuman Ring AIR – Sleep and Fitness Tracker, Black, PPG SpO2, USB‑C, 6 days battery (Size 13)

**URL:** https://aio.lv/en/product--oura-ring-uhra-aa-13-eul7--12365508
**Data updated:** 2026-04-24 13:05 (EEST)
**Category:** Smart rings
**Manufacturer:** Oura Ring
**Manufacturer code:** UHRA-AA-13-EUL7
**EAN:** 8906184873725
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Oura Ring Ultrahuman Ring AIR is a smart ring activity tracker designed for sleep and fitness monitoring. It features infrared photoplethysmography (PPG) for blood oxygen (SpO2) sensing, USB‑C charging, and a LiPo 24 mAh battery providing up to 6 days of use. Round black form factor (Size 13) tracks sleep, recovery, and daily activity for men and women with no app fee for standard features.

## Long description

The Oura Ring Ultrahuman Ring AIR is a compact smart ring in black designed for continuous sleep, recovery and activity monitoring. It uses infrared PPG sensors to measure blood oxygen (SpO2), heart rate variability and skin temperature, and pairs via Bluetooth with USB‑C charging for up to six days of battery life. The ring combines lightweight comfort with fingertip-level biometric accuracy to provide daily sleep scores, recovery insights and activity tracking without a recurring app fee for standard features.
Advantages
The ring delivers fingertip biometric readings with higher blood flow and arteriole density than wrist devices, improving the accuracy of sleep stage, HRV and skin temperature measurements. At approximately 2.4 grams and a smooth hypoallergenic inner surface, it offers a near‑invisible wearing experience suitable for round‑the‑clock use. Integrated Bluetooth connectivity and a rechargeable lithium‑polymer battery provide simple wireless syncing and up to six days of operation between charges.
Suitable for
People who want detailed sleep stage analysis and daily sleep scores
Users seeking recovery and HRV insights to optimise training and rest
Anyone preferring a discreet, lightweight alternative to wrist wearables
Those who need SpO2 monitoring and multi‑day battery life with USB‑C charging
When it may not be suitable
This smart ring may not be suitable for users who require continuous multi‑sensor wrist data such as GPS for outdoor workouts, or those who need a display on the device itself. People with very large or very small finger sizes may need to confirm fit before purchase, as accurate readings depend on proper sensor contact with the skin.
Key specifications
Form factor: round smart ring, black, size 13
Sensors: infrared PPG for heart rate, HRV, SpO2 and skin temperature
Connectivity: Bluetooth 5.0
Battery: lithium‑polymer 24 mAh, up to 6 days typical use
Charging: USB‑C charging
Water resistance: waterproof
Weight: approximately 2.4 grams
How to use
Fit the ring on the recommended finger size so sensors maintain consistent contact with the skin. Charge the ring via the included USB‑C charger and pair it with the companion app over Bluetooth to enable sleep scoring, recovery metrics and activity tracking. Wear the ring continuously, including overnight, to capture sleep stages and recovery trends; sync data regularly to review scores and suggested actions in the app.
What to consider before purchase
Confirm ring size for accurate sensor contact and reliable readings
Check compatibility of your smartphone with Bluetooth 5.0 and the companion app
Understand that device provides biometric insights but does not replace medical diagnostics
Usage recommendations
Wear the ring continuously, especially overnight, and keep it charged to maintain uninterrupted sleep and recovery tracking; ensure a proper snug fit and follow app guidance for best HRV and SpO2 measurement accuracy.

## Specifications

| Feature | Value |
|---|---|
| Battery technology | Lithium Polymer (LiPo) |
| Form factor | Round |
| Battery capacity | 24 mAh |
| Bluetooth version | 5.0 |
| Width | 8.1 mm |
| USB connector type | USB Type-C |
| Product colour | Black |
| Cables included | USB Type-C to USB Type-C |
| Bluetooth | Yes |
| Device type | Smart ring activity tracker |
| Wi-Fi | No |
| GPS (satellite) | No |
| Charging base | Yes |
| Charging time | 3 h |
| Waterproof up to | 100 m |
| Rechargeable battery | Yes |
| Housing material | Resin, Titanium |
| Heart rate monitor | Yes |
| Waterproof | Yes |
| Mobile operating systems supported | Android 6.0, Android 10.0, Android 11.0, Android 12.0, Android 13.0, Android 14.0, Android 7.0, Android 7.1, Android 7.1.2, Android 8.0, Android 8.1, Android 9.0, iOS 15, iOS 16 |
| Battery operated | Yes |
| Display type | No |
| Motion sensor | Yes |
| Charging source | USB |
| Battery life | 6 day(s) |
| Colour name | Aster Black |
| Quantity per pack | 1 pc(s) |
| Find my phone function | Yes |
| Position location | No |
| Active minutes | Yes |
| Calories burned | Yes |
| Distance travelled | Yes |
| Quality of sleep | Yes |
| Workout tracking | Yes |
| Hours slept | Yes |
| Bluetooth Low Energy (BLE) | Yes |
| Blood oxygen sensor | Yes |
| Skin temperature sensor | Yes |
| Ring size | 13 |
| Blood oxygen sensor technology | Infrared photoplethysmography (PPG) |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Oura Ring products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Oura Ring service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12365508/68500716_large.webp