The ultimate 12-digit desktop calculator with 4 operations + advanced functions (3-key independent memory, percentage, square root) + margin calculation. Rounding and decimal point adjustment. Correction key for deleting the last entered digit(s). Pop-up swivel display with 1-line 12 easy to read digits. Large and durable keys for maximum comfort. A perfect size for a maximum productivity. Dimensions : 19.7 x 14 x 4.5 cm. Perfect at home, at school, in the office, for business. Eco-friendly: solar powered with automatic shut-off after a few moments of inactivity. Dual power source: solar and AG10 battery (included).