this is must buy calculator for a business house who needs a faster calculator with smooth button.This calculator comes with an easy to use LCD display and features basic arithmetic functions such as addition, subtraction, multiplication and division. It is powered by one AAA batteries and has a sleek and lightweight design that makes it easy to carry and use. The calculator also boasts an auto shut-off feature to help conserve battery life. With this calculator, you can quickly and accurately calculate even the most complex equations.