# Sharp EL-640 (VOICE SYNTHESIZED CLOCK & CALCULATOR)

The Sharp EL-640 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 26 keys, and an LCD (liquid crystal) display. The power source is 4xAA.
**Note:** time

## Facts at a glance:

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

Type | Arithmetic |

Functions | 5 |

Keys | 26 |

Precision | 8 |

Logic | Algebraic |

Display type | LCD |

Length | 154mm |

Width | 77mm |

Thickness | 20mm |

Power Source | 4xAA |

Year introduced | 1978 |

## Replacements:

If you have a Sharp EL-640 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: