Scientific Calculator Counter 240 Functions 2 Line LCD Display Business Office Middle High School Student SAT/AP Test Calculate

Features:
3 modes, COMP(Basic Arithmetic Calculations), SD(Standard Deviation), REG(Regression Calculations).
240 functions, support Basic Calculation (a b/c /%/degree,min.,sec./FIX.SCI.RND), Memory Calculation (answer/consecutive/independent/variables/formula storage and repetitive operation), Scientific Function Calculation (sin,cos,tan inverse/cot,sec,csc/hyperbolic inverse/log and antilogarithms/Log to base/, x, 3, x², x³, x(-1), X!, xπ，A（n/m）, C(n/m).../angle unit conversion/coordinate conversion/EGN/random number), Statistical Calculation (standard deviation/regression calculation/linear regression).
79 steps input capacity for long formula calculation, cursor can flip right/left to make corrections, press up/down to indicate error position if formula goes wrong.
After the calculation is finished, you can press up/down to reproduce the result and formula. (Notice: Press ON/C will clear memory.)
2 line LCD display, the upper line for formula and the lower for result.
Hard slide-on cover protect your calculator, won't be lost.
Powered by 1 * AAA battery, battery life last for 2 years if work 1h per day. (Battery is not included.)
A multi-functional helper for students in middle/high school, can largely raise your efficiency and accuracy.
All steps are clearly stated in the user manual.
Usage:
1. Press 2ndF + AC to turn down the calculator.
2. There are 2 battery slots. You just need to insert 1pcs battery on the slot with spring. The other one is for storing backpack battery.