This Texas Instruments TI-30XS MultiView calculator is a versatile tool for students and professionals alike. With its small size and wide range of functions, it's perfect for use in a variety of settings, from the classroom to the office. Powered by solar or battery, it features a small display size and a range of unit types, including ounces. The calculator is yellow in color and comes with a cover. It has been tested and is in good working order.