This Casio desktop calculator is reliable and durable. It is compact with aluminium style front plate and anti-slip rubber feet. The calculator is solar/battery powered, solar powered when light is sufficient, else battery powered, with Auto Power-Off. It has a 10 digit angled XL display with function command signs and thousands separators. It is easy to operate, the numeric keypad is configured with an outdented zero key, for most ergonomical typing by the right hand thumb, matching with the natural right hand posture and finger movement.