Radio Shack EC-400

The Radio Shack EC-400 is an arithmetic calculator with algebraic logic. It has 8 functions, 25 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is Sealed battery pack. Note: Bowmar MX-90

Facts at a glance:

Feature Value
Type: Arithmetic
Functions: 8
Keys: 25
Logic: Algebraic
Display type: LED
Length: 133mm
Width: 80mm
Power Source: Sealed battery pack
Year introduced: 1975

See other calculators by Radio Shack