# Calculator Donau K-DT4128-01 — 12-digit desktop calculator, dimensions 14.0 x 12.2 x 2.2 cm

**URL:** https://aio.lv/en/product--donau-k-dt4128-01--10991351
**Data updated:** 2026-03-07 18:11 (EET)
**Category:** Calculators
**Manufacturer:** Donau
**Manufacturer code:** K-DT4128-01
**EAN:** 5901503616024
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 12.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--donau-k-dt4128-01--10991351

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Donau K-DT4128-01 is a compact desktop calculator with a 12-digit display and a slim housing measuring 14.0 x 12.2 x 2.2 cm. Designed for basic arithmetic and office use, it provides numeric entry and standard functions suitable for bookkeeping, invoicing, classroom tasks, and everyday calculations where a portable desktop device is needed.

## Long description

Donau K-DT4128-01 is a compact 12-digit desktop calculator in a slim housing measuring 14.0 x 12.2 x 2.2 cm. Intended for basic arithmetic and everyday office tasks, this calculator offers clear numeric display and essential functions for bookkeeping, invoicing, classroom exercises and general household calculations. Its size and layout make it suitable for placement on a desk, in a small office, or alongside paperwork where quick, reliable numeric input is required.
Advantages
The calculator combines a 12-digit display with a compact footprint, providing a balance of readability and space efficiency. Its slim design and straightforward key layout enable fast numeric entry and simple operation without a steep learning curve. The device is battery or solar powered depending on ambient light, ensuring continuous operation in typical office lighting. Durable keys and a stable base support frequent use over time.
Suitable for
Basic bookkeeping and accounting tasks
Invoice calculations and price checks
Classroom arithmetic and student use
Household budgeting and everyday calculations
Small office desktops and reception areas
Key specifications
Display: 12-digit numeric display for large numbers and totals
Housing dimensions: approximately 14.0 x 12.2 x 2.2 cm (W x D x H)
Function set: standard arithmetic functions (addition, subtraction, multiplication, division) and memory functions
Power: dual power operation (solar-assisted with battery backup for low light conditions)
Keys: tactile numeric and function keys designed for frequent use
Form factor: slim desktop model suitable for placement on a work surface
How to use
Place the calculator on a flat surface with sufficient light for the solar panel to function. Use the numeric keys to enter figures and the arithmetic keys to perform calculations. Memory functions allow storing and recalling values during multi-step computations. Clear the current entry or reset the calculation using the dedicated clear key. For longer sessions in low light, ensure the internal battery is functional so the calculator continues to operate without interruption.
Usage recommendations
Keep the calculator on a stable desk surface and avoid exposure to direct sunlight for extended periods to prevent surface discoloration. Clean the keys gently with a dry cloth and replace the battery according to typical usage patterns to maintain reliable performance.

## FAQ

### How much does the Calculator Donau K-DT4128-01, 12-digit desktop 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 — 3 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 16.07.2026 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 Donau 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 Donau 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/10991351/61432216_large.webp