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Unisonic 839 SQ

The Unisonic 839 SQ is an arithmetic calculator with 10 digits precision and algebraic logic. It has 7 functions, 24 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 4xAA.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions7
Keys24
Precision10
LogicAlgebraic
Display typeLED
Length152mm
Width89mm
Power Source4xAA
Year introduced1975

Replacements:

If you have a Unisonic 839 SQ 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:

See other calculators by Unisonic