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

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.