Features Great For The Office: The large tilted display makes the number crunching so much easier. And of course the elegant design will add pizazz to your workspace. Perfect For Home Use: The elegant design will add a little excitement to the way you pay those bills. The easy to read large LCD screen and dual power makes it that much more efficient. Extra Large LCD Display With Dual Power: The extra large LCD display allows you to see the digits from anywhere on your desk. The dual power helps make sure that the calculator will function even in a dim place. Specification Size: 7. 5*4. 5*0. 4in Weight: 150g（5. 3oz） Color: White Material: ABS plastic Functional keys instruction ON/AC key: turn on/clear MR/MC key: Memory recall or clear M+/M- key: Memory plus or minus OFF key: turn off