This calculator features a large, clear display screen for easy readability that helps reduce eye strain during use. It includes useful function keys for grand total, markup, memory clear and recall, as well as memory add and subtract functions to handle both basic and complex calculations. Its large, easy-to-press buttons and clear display make it simple and convenient to use whether at home or in an office. It runs on dual power sources for long-lasting use, so you will not have to worry about running out of power, it has an auto power-off feature that turns itself off after around six minutes of idle time. The well-built, durable plastic keys stand up to frequent use without showing signs of wear, delivering a reliable, quality feel with every press. Available colors: Black and Silver (2-Pack), Black (2-Pack), Black (Commercial).