If you're a math, science, or engineering professional?or a serious college student?don't leave home without it! HP's most powerful new graphing calculator. The 50G supplies you with intensive power, flexibility, and connectivity. With graphing capabilities, you can illustrate statistical regression analysis and other computations. There's ample memory for storing programs and you can add additional storage using optional SD memory cards. With 2300 built-in functions, this calculator is an indispensible tool for a student or scientific professional aiming to succeed to the highest order - and beyond. Efficiently reach solutions with the built-in lessons and step-by-step problem solving Format SD cards and expand memory right in the SD card slot Isolate and evaluate sub-expressions using the intelligent editor?plus cut, paste, and copy objects Numerical precision - intermediate and internal - 15 digits, exponent - -49999 to +49999 /Displayed precision - 12 digits, exponent - -499 to +499, infinite for integers (limited by memory) IR port - IrDA (limited to 10 cm distance) / Serial port - USB, RS232 for connections to equipment such as PCs, dataloggers,surveying equipment, etc./ Expansion port - SD card slot / Power supply - AAA x 4 + CR2032 batteries Entry-system logic - Textbook, Algebraic, RPN Unit Dimensions - 7.24 x 3.43 x. 93 inches Manufacturer's One-year limited warranty