This Texas Instruments TI-30XA Student Scientific Calculator has been thoroughly tested and is fully functional. It has all the features you need for your scientific calculations, including regular key size, battery power, and a regular display size. The handheld size makes it easy to carry with you wherever you go. With its sleek design and Texas Instruments branding, this calculator is perfect for students or professionals alike. The model number is TI-30XA and it has dimensions of 6x3x0.70 inches. You can trust this calculator for all your mathematical needs.