Radio Shack EC-4009
The Radio Shack EC-4009 is a scientific calculator with 8 digits precision and algebraic logic. It has 43 functions, 38 keys, and an LCD (liquid crystal) display. Note: Casio fx-98
Facts at a glance:
If you have a Radio Shack EC-4009 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: