Good for the environment: Solar-powered: no battery or replacement needed, can be operated from 50 Lux and upwards - Ergonomic: angled display for better reading - 12-digit LCD - 1-line display - 3-key memory - Percent button - Root calculation - Grand total function - Delete key: deletes the last number entered - Double zero key - Automatic rounding - Change sign - Decimal switch selector - Automatic switch-off