OSALO Scientific Calculator 240 Functions Secondary School Maths OS-991MS 2 | Dual Power Solar & Battery Math Scientific Calculator for Secondary School & GCSE Exams, 2 Line Written Display OS-991MS II

【Ultra-light & Portable】Weight: 4.97oz. (141g); Size: 164 x 80 x 17(mm)/6.4 x 3.15 x 0.6 7(inch); Material: ABS plastic. With slide-on hard case, convenient to carry it outside and hold it in one hand. 【Dual Power Source Electronic Calculator】Solar and battery, double safe uninterruptible power, environmental protection and energy saving advantages. 【2-Line Scientific Calculator】Input expressions and arithmetic operations is easier to read than traditional calculators. The 2 line display shows both input and calculation results, convenient for students to check the calculation process and results. 【Brightness Adjustment Function】The screen brightness can be adjusted by simple operation to get the best display effect, dimming to relieve eye fatigue, brightening to get clearer display results, to improve the calculation efficiency. 【401 Functions Scientific Calculator】With 401 functions for fractions, matrix calculations, statistics, calculus, complex number calculations, equation calculation, standard deviation, vector calculation, permutations and combinations, solar scientific calculator covers most of the scientific functions that students from middle school through college will need to use in their courses and on exams. Reading instruction attached will help you know how to use and find these functions.