This is a Texas Instruments TI-35 calculator, a scientific calculator designed for various mathematical functions. The calculator features a silver and black design with a clear display screen at the top. It has a range of functions including trigonometry, logarithms, and exponential calculations. The calculator is in good condition, with minimal signs of wear. The keys are clean and functional, and the display screen is clear and easy to read. The dimensions of the calculator are not specified, but it is a standard size for a scientific calculator. The TI-35 is a reliable and accurate calculator, suitable for students, professionals, and anyone who needs to perform complex mathematical calculations.