# Smart ring Colmi R03 21.3 mm size 12 Black

**URL:** https://aio.lv/en/product--colmi-r03-black-12--11108745
**Data updated:** 2026-03-16 16:35 (EET)
**Category:** Smart rings
**Manufacturer:** Colmi
**Manufacturer code:** R03 Black 12
**EAN:** 6972436985623
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 22.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 19.00 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--colmi-r03-black-12--11108745

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Colmi R03 is a smart ring with a 21.3 mm inner diameter in size 12, finished in black. Designed to be worn on a finger, it offers compact wearable functionality for basic smart notifications and activity tracking. The ring’s discreet form factor suits everyday use and provides a comfortable alternative to larger wearables for users who prefer minimal on-body tech.

## Long description

Colmi R03 is a smart ring with a 21.3 mm inner diameter (size 12) in black, designed for daily wear. The titanium alloy housing and lightweight construction (4.7 g) provide comfort, while 5ATM water resistance and corrosion-resistant materials allow use during routine activities and swimming. The ring pairs with the QRing app (Android, iOS, Harmony OS) to display health data, activity logs and reports. The package includes the smartring, a USB-C cable, a magnetic charging case and a user manual.
Advantages
The Colmi R03 offers continuous health monitoring (heart rate and blood oxygen), sleep tracking with phase analysis, and 21 sports modes for activity recording. Its built-in 18 mAh lithium‑polymer battery provides about 5–7 days of operation on a single charge and charges in about 1 hour. The supplied 200 mAh charging case extends usage by recharging the ring up to 13 times. Bluetooth 5.0 ensures stable connection and OTA updates are supported.
Suitable for
Everyday health monitoring (heart rate, SpO2, sleep)
Activity tracking: steps, calories, distance, 21 sport modes
Users who prefer a discreet wearable instead of a smartwatch
Swimming and water activities (5ATM water resistance)
Key specifications
Manufacturer: Colmi
Model: R03
Color: Black
Size / Inner diameter: 12 / 21.3 mm
Material: Titanium alloy
Weight: 4.7 g
Main chipset: BlueX Micro RF03
Memory: ROM 512 KB
HR sensor: Vcare VC30F
Accelerometer: STK8321
Connectivity: Bluetooth 5.0
Ring battery: 18 mAh lithium‑polymer, magnetic charging, ~1 h charge, 5–7 days operation
Charging case battery: 200 mAh lithium‑polymer, USB‑C charging, ~1 h charge, recharges ring up to 13 times
Charging cycles: over 300 (ring) / approximately 300 (case)
Water resistance: 5ATM
Compatibility: Android 4.4+; iOS 8.0+; Harmony OS
App: QRing (provides daily/weekly/monthly reports, OTA updates)
How to use
Install the QRing app on a compatible smartphone and follow the in‑app pairing procedure via Bluetooth 5.0. Wear the Colmi R03 on a finger with the sensor side contacting the skin. Use the app to view heart rate, SpO2, sleep data, step count and sports‑mode recordings. Place the ring in the magnetic charging case to recharge; the case itself charges via the included USB‑C cable. Allow about 1 hour for a full charge of either the ring or the case.
Usage recommendations
For best accuracy, wear the ring snugly on the chosen finger and keep firmware and the QRing app updated. Avoid strong impacts to the titanium alloy surface and rinse the device with fresh water after exposure to chlorinated or salty water.

## FAQ

### How much does the Smart ring Colmi R03 size 12 cost, and is it available for purchase?

The price is 22.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 126 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 09.07.2026 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/11108745/61795157_large.webp