Casio scientific calculator 2nd edition:2-line display fx-991ms
•it has 401 functions
•equation solver (calc,solve)
•integration and differentiation
•multi-replay function
•permutation and combination
•complex number calculation
•statistical calculations
•using engineering notation and engineering symbols
•calculation history
•base-" calculation (base)
•power requirements:fx-100ms/570:aaa-size battery r03 (um-4)×1
•fx-991ms:built-in soar cell; button battery lr44×1
approximate battery life (based on one hour of operation per day); fx-100ms/570ms:two years
fx-991ms:three years.
•power consumption:0.0001 w (fx-100ms/570ms)
•operation temperature:0°c to 40°c (32°f to 104°f)