Style:

Scientific

Material:

Plastic

Power Source:

Battery

Max. Digits:

12

Product Description Yes, it do is the famous Japanese calculator manufacturer's product.  Please note that this is genuine FX-991ES Plus Scientific Calculator and not counterfeit or imitation.
  There is only Chinese paper manuals available for Calculators of Asian versions now.

But it's easy to get English manuals in pdf format on Internet. eg: Please Google "FX 991 Manual". Thanks.  Size: 11.1mm(H)x80mm(W)x162mm(D)
Weight: About 95g(Battery Included)

Functions:

Two Way Power

Natural Textbook Display

Easy Menu Function

Multi-Replay Function

Equation Solver

Numerical Differentiation/Integration

1 Independent Memory

Standard <-> Decimal Transformation

40 Metric Conversions

40 Scientific Constants

Matrix/Vector Calculations