The Texas Instruments BA II Plus Professional Financial Calculator S-0307 is a compact and reliable tool for professionals in finance and science. With a small key size, regular display size, and powered by batteries, this pocket-sized calculator is perfect for on-the-go use. It features an LCD display, calculus functions, and programmable features, making it a versatile option for complex calculations. The BA II Plus model from Texas Instruments is a trusted choice for those in need of a high-quality financial calculator for their business or office needs. There is some paint spots on the back of the case cover but this has not affected the calculator in any way. If you have any questions please feel free to contact me.