The Texas Instruments TI-30X IIS Scientific Calculator in black is a handheld device with a regular size display and key size.

----   Yes, it is in working condition.

----  It is powered by solar and (battery  included) making it convenient for use anywhere.

---- This calculator features a multi-line display and statistical functions, making it perfect for students and professionals alike.

----  Made by Texas Instruments in China, this model is designed to provide accurate calculations and is a reliable tool for various mathematical tasks.