Best view
Large display characters are easier for reading, reduce fatigue from work.

Super solar
Solar cell powers calculations even when lighting is relatively dim.

Profit margin percent
"%" key gives quick access to prices and profits, and also delivers add-ons, discounts, ratios and increase / decrease values.

Function command signs
A symbol (+, -, ×, ÷) on the display indicates the status of operation you are currently performing.