# Desktop calculator Donau TECH K-DT4120-01 — 12-digit display, dimensions 185×140×37 mm, black

**URL:** https://aio.lv/en/product--donau-k-dt4120-01--11799855
**Data updated:** 2026-03-09 07:36 (EET)
**Category:** Calculators
**Manufacturer:** Donau
**Manufacturer code:** K-DT4120-01
**EAN:** 5901503626085
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--donau-k-dt4120-01--11799855

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Donau TECH K-DT4120-01 is a desktop office calculator with a 12-digit display and compact housing sized 185×140×37 mm. Designed for everyday calculations in offices, shops and accounting tasks, it offers clear numeric visibility and standard calculator functions. The black finish suits professional environments and desktop use.

## Long description

Donau TECH K-DT4120-01 is a desktop office calculator with a 12-digit display and a compact housing measuring 185×140×37 mm. It is designed for everyday calculations in offices, shops and accounting tasks, providing clear numeric visibility on a large single-line screen. The device combines standard arithmetic functions with a stable, low-profile design intended for desktop placement and frequent use.
Advantages
The calculator offers a 12-digit display that makes it suitable for financial and accounting figures, reducing the need for mental rounding. Its compact dimensions and flat profile save desk space while maintaining key placement ergonomics for efficient data entry. The black finish provides a neutral, professional appearance that integrates easily into office environments. The overall construction focuses on straightforward operation and reliable basic functionality.
Suitable for
Everyday office arithmetic and bookkeeping
Point-of-sale and retail cash calculations
Basic accounting entries and invoice checks
Home budgeting and financial planning
Key specifications
Display: 12-digit numeric LCD
Dimensions: 185 × 140 × 37 mm (length × width × height)
Color: black housing
Form factor: desktop / low-profile
Function set: standard arithmetic operations and basic memory functions
How to use
Place the calculator on a flat desktop surface within easy reach of your work area. Use the numeric keypad and function keys to enter values and perform arithmetic operations. For sequential calculations, employ the memory keys to store and recall intermediate results. The single-line 12-digit display shows the current entry or result; verify entries visually before confirming totals. Follow standard calculator input conventions: clear the display before beginning a new calculation and use the decimal key where required.
Usage recommendations
For reliable operation, keep the calculator on a clean, dry surface and avoid exposure to direct sunlight or excessive heat. Replace batteries according to the manufacturer’s guidance and clean the housing with a soft, dry cloth. For frequent accounting tasks, pair the calculator with a nearby notepad or spreadsheet to record results and maintain a clear audit trail.

## FAQ

### How much does the Donau TECH K-DT4120-01 desktop calculator cost, and is it available for purchase?

The price is 14.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6215 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 15.07.2026 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/11799855/67201242_large.webp