Unisonic 840-C

Unisonic 840-C
Image: Joe Haupt, CC BY-SA 2.0
The Unisonic 840-C is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 24 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAAA.

Facts at a glance:

Feature Value
Type: Arithmetic
Functions: 6
Keys: 24
Precision: 8
Logic: Algebraic
Display type: VFD
Length: 127mm
Width: 76mm
Power Consumption: 0.300W
Power Source: 4xAAA
Year introduced: 1975

See other calculators by Unisonic