Radio Shack EC-4040
The Radio Shack EC-4040 is a programmable calculator with 12 digits precision and algebraic logic. It has an LCD (liquid crystal) display. Note: Casio fx-P401
Facts at a glance:
If you have a Radio Shack EC-4040 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: