This Texas Instruments TI-30X IIS Scientific Calculator is a reliable tool for any student or professional. With its regular key size and display size, it makes calculations easy and efficient. Powered by batteries, it's perfect for on-the-go use and its handheld size makes it easy to carry around.

This calculator has been thoroughly tested and works perfectly for all your mathematical needs. It's a great investment for anyone in need of a scientific calculator. The brand is Texas Instruments and the model is TI-30X IIS.