# Sperry Remington 661 (Sperry Rand Remington 661)

The Sperry Remington 661 is an arithmetic calculator with 6 digits precision and algebraic logic. It has 4 functions, 16 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA.
**Note:** 6 digit display, 12 digits internal precision

## Facts at a glance:

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

Type | Arithmetic |

Functions | 4 |

Keys | 16 |

Precision | 6 |

Logic | Algebraic |

Display type | VFD |

Length | 152mm |

Width | 83mm |

Power Consumption | 0.850000W |

Power Source | 4xAA |

Year introduced | 1972 |

## Replacements:

If you have a Sperry Remington 661 that is no longer working, you can first try replacing the 4xAA 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: