# Smart ring Colmi R03 18.1 mm size 8 Black

**URL:** https://aio.lv/en/product--colmi-r03-black-8--11108741
**Data updated:** 2026-03-16 16:35 (EET)
**Category:** Smart rings
**Manufacturer:** Colmi
**Manufacturer code:** R03 Black 8
**EAN:** 6972436985586
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 15.49 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 12.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--colmi-r03-black-8--11108741

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Colmi R03 is a smart ring in black finish with an inner diameter of 18.1 mm (size 8). Designed for compact on‑finger wear, it offers wearable smart functionality in a ring form factor. Suitable for users who prefer discrete health and notification features on their hand, the ring fits daily use and simplifies interactions without wearing a wrist device.

## Long description

Colmi R03 smart ring (size 8, inner diameter 18.1 mm) in black provides convenient access to health and activity data via the QRing app. The titanium alloy ring is lightweight (4.7 g), water resistant to 5ATM and comes with a magnetic charging case and USB-C cable. It records sleep stages and quality, continuous heart rate, blood oxygen, steps, calories and distance, and supports 21 sports modes. The ring pairs with Android, iOS and Harmony OS devices over Bluetooth 5.0 and receives OTA updates.
Advantages
The Colmi R03 combines compact design and durability: titanium alloy construction resists corrosion and wear while the 5ATM rating allows use during swimming and intense workouts. The included charging case extends operating time by recharging the ring up to 13 times on a single case charge. Lightweight construction and a variety of sensors provide continuous health monitoring and activity tracking accessible in the QRing app.
Key specifications
Manufacturer: Colmi
Model: R03
Color: Black
Size / Inner diameter: 8 / 18.1 mm
Material: Titanium alloy
Weight: 4.7 g
Main chipset: BlueX Micro RF03
Memory: ROM 512 KB
HR sensor: Vcare VC30F
Accelerometer: STK8321
Bluetooth: 5.0
Ring battery: lithium-polymer 15 mAh, magnetic charging, 3–5 days operating time, charging time about 1 h, over 300 cycles
Charging case battery: lithium-polymer 200 mAh, USB-C charging, approx. 300 cycles, charging time about 1 h
Compatibility: Android 4.4 or later, iOS 8.0 or later, Harmony OS
App: QRing
Water resistance: 5ATM
Features available in app: step counter, calorie counter, distance measurement, heart rate, sleep monitoring, 21 sports modes, exercise log, blood pressure, SpO2, stress level, remote photo
Updates: OTA
How to use
Install the QRing app on an Android or iOS device, enable Bluetooth and follow the app pairing instructions to connect the Colmi R03. Wear the ring on a comfortable finger so sensors maintain contact with skin. Use the app to view daily, weekly and monthly reports for heart rate, sleep, SpO2 and activity data. Place the ring in the magnetic charging case and connect the case via the included USB-C cable to recharge the case and the ring; a full charge of the ring takes about 1 hour.
Recommendations
Charge the case before first use and keep the ring clean and dry except when swimming; although rated to 5ATM, avoid exposing the ring to detergents or salt water for prolonged periods. For accurate measurements, wear the ring snugly and ensure the sensor area contacts the skin. Use the QRing app to update firmware via OTA and to review health reports regularly.

## FAQ

### How much does the Smart ring Colmi R03 size 8 cost, and is it available for purchase?

The price is 15.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 50 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 08.07.2026 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: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. 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 Colmi 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 Colmi 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/11108741/61795133_large.webp