# Desktop calculator Donau K-DT4121-13, 12-digit display, 190×143×40 mm, silver

**URL:** https://aio.lv/en/product--donau-k-dt4121-13--11799882
**Data updated:** 2026-03-09 07:36 (EET)
**Category:** Calculators
**Manufacturer:** Donau
**Manufacturer code:** K-DT4121-13
**EAN:** 5901498132998
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 16.49 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 13.63 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--donau-k-dt4121-13--11799882

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Donau desktop calculator model K-DT4121-13 features a 12-digit display and compact dimensions of 190×143×40 mm in a silver finish. Designed for office and everyday arithmetic tasks, it provides basic functions for additions, subtractions, multiplications and divisions. Suitable for bookkeeping, invoicing and general desk use.

## Long description

Donau K-DT4121-13 is a desktop calculator with a 12-digit display and compact housing measuring 190×143×40 mm. Finished in silver, it provides the essential arithmetic functions — addition, subtraction, multiplication and division — in a design intended for everyday office use. The layout and size make it suitable for placement on a desk, next to invoices, spreadsheets or bookkeeping documents.
Advantages
The calculator offers a clear 12-digit readout that facilitates working with larger numbers and totals. Its compact footprint conserves desk space while retaining a full set of basic keys for fast numeric input. The silver finish delivers a neutral look that integrates with standard office equipment. The device is designed for straightforward operation without advanced menus, reducing the learning curve for routine calculations.
Suitable for
General office arithmetic and everyday calculations
Bookkeeping and invoice totaling
Basic financial checks and price calculations
Students needing a reliable desk calculator for study and practice
Key specifications
Display: 12-digit numeric display for totals and calculations
Dimensions: 190 × 143 × 40 mm (length × width × height)
Colour: silver housing and keypad accents
Primary functions: addition, subtraction, multiplication, division
Form factor: desktop calculator with full numeric keypad
How to use
Place the calculator on a stable desk surface near your working documents. Enter numbers using the numeric keypad and perform operations using the standard arithmetic keys. For multi-step calculations, use the equals key to obtain intermediate totals, and clear the current entry with the clear key when necessary. The layout is intended for direct, single-step input suitable for bookkeeping and invoice addition tasks.
Usage recommendations
Keep the calculator on a flat surface and avoid exposure to direct sunlight or excessive humidity. Use a soft, dry cloth to clean the housing and keypad. For reliable performance, replace batteries according to the manufacturer’s guidance and avoid using excessive force on keys to prolong device life.

## FAQ

### How much does the Donau K-DT4121-13 desktop calculator cost, and is it available for purchase?

The price is 16.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2757 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 14.07.2026 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/11799882/67201276_large.webp