# Smart ring Colmi R03 20.3mm size 11 Black

**URL:** https://aio.lv/en/product--colmi-r03-black-11--11108744
**Data updated:** 2026-03-16 16:35 (EET)
**Category:** Smart rings
**Manufacturer:** Colmi
**Manufacturer code:** R03 Black 11
**EAN:** 6972436985616
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 22.99 €
**Prices and availability valid until:** 2026-07-22 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-11--11108744

## 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 20.3 mm inner diameter in size 11, finished in black. Designed for wearable health and notification monitoring, it pairs with compatible smartphones to provide discreet alerts, activity and sleep tracking, and basic biometric data depending on app support. Lightweight and compact, it suits users who prefer minimal wearable devices and want continuous on-finger monitoring.

## Long description

Colmi R03 smart ring (20.3 mm, size 11) in black is a compact wearable for continuous on-finger health and activity tracking. Lightweight (4.7 g) and made of titanium alloy, the ring connects via Bluetooth 5.0 to the QRing app (Android, iOS, Harmony OS) to display measurements, activity reports and notifications. The device is water resistant to 5ATM, comes with a magnetic-charging case and USB-C cable, and provides several days of operation between charges.
Advantages
The Colmi R03 offers continuous heart rate monitoring, blood oxygen (SpO2) measurement, and sleep tracking with phase analysis, all visible in the QRing app. It records steps, distance and calories, supports 21 sports modes and generates daily, weekly and monthly reports. Durable titanium-alloy construction, 5ATM water resistance and a lightweight 4.7 g design support comfortable daily use. The charging case extends runtime by allowing up to 13 recharges of the ring on a single case charge.
Suitable for
Users who prefer minimal and discreet wearables
People tracking daily activity: steps, distance and calories
Those monitoring sleep quality and heart rate trends
Swimmers and users who need water-resistant wearables (5ATM)
Owners of Android 4.4+/iOS 8.0+/Harmony OS devices using the QRing app
Key specifications
Manufacturer: Colmi
Model: R03
Color: Black
Size / Inner diameter: 11 / 20.3 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: 18 mAh lithium‑polymer, magnetic charging, ~1 h charge time, 5–7 days runtime
Charging case battery: 200 mAh lithium‑polymer, USB‑C charging, ~1 h charge time, recharges ring up to 13 times
Number of charging cycles (ring & case): ≈300+
Water resistance: 5ATM
Compatibility: Android 4.4 or later, iOS 8.0 or later, Harmony OS
App: QRing
Available app features: step counter, calorie counter, distance, heart rate, sleep monitoring, 21 sports modes, exercise log, blood pressure, SpO2, stress level, remote photo
How to use
Install the QRing app on a compatible smartphone (Android, iOS or Harmony OS), enable Bluetooth and pair the Colmi R03. Wear the ring on a finger with a comfortable fit and allow the app to access required permissions for sensors and notifications. Use the app to view real‑time measurements, activity logs and generated reports. Charge the ring magnetically in the provided charging case and connect the case to power via the included USB‑C cable when the case battery needs recharging.
Usage recommendations
For accurate biometric readings, wear the ring snugly on a stable finger position, keep sensors clean, and ensure the QRing app is updated via OTA. Avoid exposing the ring to strong chemicals or extreme temperatures; 5ATM water resistance allows swimming but not prolonged high‑pressure water exposure. Charge the case regularly to maintain the ring’s extended runtime.

## FAQ

### How much does the Smart ring Colmi R03 size 11 Black 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 — 90 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/11108744/61795151_large.webp