The infamous Sharp EL-640 talking calculator, alarm clock, timer, clock, and calendar. One of the most rare items in the blind community and now you have a chance to own one. This is the rare model that everyone wants and includes a clock, calendar, timer, alarm clock, hourly chime, 5 minute chime, daylight savings button, and a calculator. it does a lot of things and does them amazingly well! This calculator is in like new condition with original case.