Calculator Desktop Genie 840 BK

The Genie 840 BK is a compact desktop calculator with a large, tilting 10-digit single-line display and a black/grey finish. It combines solar cells with a battery for reliable operation in changing light conditions. The calculator has a durable plastic keyboard designed for easy use and cleaning and provides essential arithmetic and memory functions for everyday desk work.

Advantages

Dual-Power supply ensures continuous operation by using solar energy when light is sufficient and automatically switching to the included battery when light is low. The angled, large 10-digit display improves readability, while the robust plastic keys are designed for comfortable input and simple maintenance. Compact dimensions and neutral colouring make it suitable for a variety of office environments.

Suitable for

• Basic office calculations and bookkeeping
• Home budgeting and expense tracking
• Cashiers and point-of-sale desktop use
• Students performing arithmetic and percentage calculations

Key specifications

• Model: Genie 840 BK (MPN: 12258, EAN: 4015468122580)
• Display: 10-digit, single-line, tilting
• Power supply: Dual-Power (solar + battery); battery included
• Keyboard: Plastic keys, easy to clean
• Functions: addition, subtraction, multiplication, division, square root, percentage, 4-button memory (M+, M-, MR, MC)
• Colour: black/grey

How to use

Place the calculator on a flat surface and tilt the display to a comfortable viewing angle. Use the numeric and operator keys for basic arithmetic operations. For memory operations, use M+ to add to memory, M- to subtract from memory, MR to recall stored value and MC to clear memory. The device will use solar power when sufficient light is present and switch to battery automatically when light is low; replace the battery when the display becomes dim or unstable.

Usage recommendations

Keep the solar panel clean and place the calculator in a well-lit area for optimal solar operation; avoid exposing the device to direct sunlight for prolonged periods to prevent surface damage. Clean the plastic keys with a soft, slightly damp cloth and do not use abrasive cleaners.