# Smart ring Ultrahuman Ring Air Size 09 — Aster Air Black, PPG SpO2, USB-C, 6-day battery

**URL:** https://aio.lv/en/product--ultrahuman-aa09--10912512
**Data updated:** 2026-03-23 16:07 (EET)
**Category:** Smart rings
**Manufacturer:** Ultrahuman
**Manufacturer code:** AA09
**EAN:** 8908022329531
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 399.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 330.57 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ultrahuman-aa09--10912512

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Tuesday | free |
| Pickup points | 19.06.2026 | 1.99 EUR |
| Courier delivery to door | 19.06.2026 | 4.99 EUR |

## Summary description

Ultrahuman Ring Air is a smart ring activity tracker (Size 09, Aster Air Black) with a round form factor and 8.1 mm width. It uses infrared photoplethysmography (PPG) to measure blood oxygen (SpO2) and other biometric signals. Built-in 24 mAh LiPo battery provides up to 6 days of use. Recharge via USB Type-C. Suited for continuous health tracking, sleep monitoring and daily activity insights.

## Long description

The Ultrahuman Ring Air Size 09 — Aster Air Black is a compact smart ring activity tracker designed for continuous biometric monitoring in a low-profile, 8.1 mm round form factor. Using infrared photoplethysmography (PPG), the ring measures blood oxygen (SpO2) and other physiological signals to provide daily health and activity insights. A built-in 24 mAh LiPo battery delivers up to six days of use on a single charge and recharges via USB-C for convenient, fast top-ups. The ring focuses on sleep tracking, recovery analysis, heart rhythm monitoring and daily activity metrics to help users track trends and make data-driven adjustments to lifestyle and training.
Advantages
The Ultrahuman Ring Air provides continuous passive monitoring of key biometric signals including SpO2, heart rhythm, and motion data, enabling 24/7 tracking without bulky wearables. Its small width and round design make it comfortable for day and night use while the infrared PPG sensor permits nocturnal measurements such as AFib detection, sleep-stage analysis and recovery scoring. Long battery endurance and USB-C charging reduce friction for everyday use, and the accompanying analytics translate raw signals into actionable metrics like sleep score, recovery score, VO2 Max estimation and activity summaries.
Suitable for
People who want continuous sleep tracking and daily sleep scores
Users seeking passive recovery and HRV-informed recovery insights
Athletes and fitness-minded users tracking steps, calories, distance and VO2 Max
Individuals interested in overnight heart rhythm monitoring and early AFib detection
Anyone who prefers a discreet, low-profile wearable for 24/7 health tracking
Key specifications
Form factor: round smart ring, 8.1 mm width
Biometric sensors: infrared PPG for SpO2 and heart rhythm monitoring
Battery: 24 mAh LiPo, up to 6 days of typical use
Charging: USB Type-C charging interface
Monitoring features: continuous activity tracking, sleep stages, sleep score, recovery score, HRV-based insights, AFib detection, VO2 Max estimation
Activity metrics: steps, distance, calories, movement logging
How to use
Place the Ultrahuman Ring Air on the finger size 09 and pair it with the compatible mobile application following the in-app pairing steps. Wear the ring continuously, including during sleep, to capture uninterrupted biometric and motion data. Charge the ring using the provided USB-C charger when battery levels are low; a single full charge typically supports up to six days of regular use. Use the app to view daily sleep scores, recovery analysis, heart rhythm reports and activity summaries, and to adjust personal settings such as dominant hand, activity goals and notification preferences.
Usage recommendations
For best data quality, wear the ring snugly but comfortably on the finger that gives the best fit; avoid loose placement. Keep the sensor area clean and dry, and charge the ring regularly to ensure continuous monitoring. Use nightly sleep reports and recovery scores to plan rest, naps and training intensity. Consult a healthcare professional if the device indicates potential AFib or other irregular heart rhythm findings that require medical attention.

## 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 | 9 |
| Blood oxygen sensor technology | Infrared photoplethysmography (PPG) |

## FAQ

### How much does the Ultrahuman Ring Air Size 09 — Aster Air Black cost, and is it available for purchase?

The price is 399.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Tuesday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Ultrahuman Ring Air Size 09 — Aster Air Black be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Ultrahuman 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 Ultrahuman 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/10912512/62120560_large.webp