This Texas Instruments BA II 2 Plus Professional Business Analyst Calculator is a reliable tool for any mathematician. It is a handheld device with a regular sized display and runs on battery power. The calculator is made by Texas Instruments, a trusted brand known for producing high-quality calculators. This calculator is perfect for business, industrial, and office use. It is a basic, financial, and scientific calculator all in one. The key size is regular, and the model is Texas Instruments BA II 2 Plus. It has been tested for functionality and is ready for use.