Model Name : Casio Scientific Calculator FX-991ES
Natural V.P.A.M. display
* List based STAT-data editor
Viewing and editing of input data in list format, showing data groups (x-data, y-data, frequency) and surrounding data
Quick and easy recall of previously executed formulas for editing and re-execution.
* 10 + 2 digits
10-digit mantissa + 2-digit exponential display.
* Dot matrix display
High-resolution screen provides beautiful looking graphs every time.
* Plastic keys
Designed and engineered for easy operation.
* Two-way power (Solar+Battery)
Solar powered when light is sufficient, battery