# Radio Shack EC-420

The Radio Shack EC-420 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 10 functions, 28 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA.

## Facts at a glance:

Feature | Value |
---|---|

Type | Arithmetic |

Functions | 10 |

Keys | 28 |

Precision | 8 |

Logic | Algebraic |

Display type | VFD |

Length | 133mm |

Width | 76mm |

Power Source | 2xAA |

Year introduced | 1977 |

## Replacements:

If you have a Radio Shack EC-420 that is no longer working, you can first try replacing the 2xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: