Function Scientific Calculator

• Textbook synchronous display, tabular statistics and 10 position radix + 2 position exponent. Used for scientific calculation, namely function calculation.
• Multi-step reappear, dotmatrix display and Plastic buttons. Touch keyboard, easy to click.
• Multi-function mathematical calculator: It can be used to calculate advanced functions.
• High quality material: durable, stable and responsive. Designed for students and office workers.
• Upgrade motherboard: more stable work. It can help you solve problems you encounter in your study, convenient to calculate.
• ​Power Source:  work with coin battery  , not â€‹Solar power
• Packing:

  1x Scientific Calculator (no original packaging)

  1x manual 

PLEASE Note: There are 991ES PLUS & 991ES  TWO models

991es plus have 417 kinds of functions

991es have 240 kinds of functions