# MBO Sigma 2

The MBO Sigma 2 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 8 functions, 25 keys, and a VFD (vacuum fluorescent) display. The power source is PP3 9V.

## Facts at a glance:

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

Type | Arithmetic |

Functions | 8 |

Keys | 25 |

Precision | 8 |

Logic | Algebraic |

Display type | VFD |

Power Source | PP3 9V |

Year introduced | 1975 |

## Replacements:

If you have a MBO Sigma 2 that is no longer working, you can first try replacing the PP3 9V battery. 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: