This Texas Instruments TI-36X Pro Advanced Scientific Engineering Calculator is a powerful tool for students and professionals alike. With its LCD display, calculus function, and programmable features, it is perfect for solving complex equations and displaying your work. This calculator runs on solar power and is handheld, making it easy to use and transport. The calculator is personal with Izzy, Isabelle and a smiley face in black marker on the back of the calculator. Also one of the rubber feet is missing. The buttons have wear. See pics for details. Pn The calculator is made by Texas Instruments, a trusted brand known for producing high-quality calculators. It has a regular key size and display size, and is designed for both basic and scientific use. The TI-36X Pro model is manufactured in China and is ideal for those in need of a reliable and efficient calculator for their everyday work.