401 rekenfuncties, wetenschappelijke rekenmachine op zonne-energie met 6-inch schrijftablet, opvouwbare professionele rekenmachine PK

VAORLO DS-S11 Scientific Calculator with LCD Writing Tablet, 401 Function Solar Energy Science Calculators Notepad, Professional Foldable Calculators,Electronic Board Drawing/Memo Pads For School/College/Work/Office/Business/Researchers/Students/Teachers PK 991MS 991ES Calculator [401 Computing Functions] Include CALC, SOLVE, CONV, Base-N(BASE), Equation(EQN), VECTOR(VCT),MATRIX(MAT),fractions, variable statistics, Metic Conversion, complex number calculations, linear regression, base arithmetic, computer science, standard deviation, and polar-rectangular conversions, etc.. [Natural Textbook Display] Displays fractions, equations and calcultion results as they appear in textbook. Can input/output the content in writting form and tabular statistics. [The Best Gift] This calculator is very suitable for students in elementary school, junior high school, high school, college, engineers, nurses, and teachers, etc. It can meet their calculation needs in the fields of mathematics, science, and engineering, and help them better understand and apply knowledge. Therefore, as a gift, it can be given to these people who need to perform scientific calculations. [SMALL AND PORTABLE] Calculators with Clamshell design makes it easy to carry, perfect choice for business at work, accounting calculations, student calculations, home use, etc... [Calculators With Notepad] Calculators and notepad are designed in one, you can take notes while calculating, improving study and work efficiency. [REPEATED WRITING] Calculators with No dust and ink, LCD handwriting,No blue light LCD screen protects your eyes. Equipped with an ergonomic magnetic stylus on the back, allowing you to write/draw bright and clear lines. With an erase button,After use, you can clear the full screen with a click to effectively reused, reduce paper consumption, and achieve the goal of environmental protection. [Solar Energy ] Calculators uses Solar panel + replaceable button battery for long-term use. Built-in 2 button batteries, 1PCS LR1120 calculator battery, 1PCS CR1220 LCD writing board battery. (If the battery is dead, you can replace the battery by yourself) [WHAT'S IN THE BOX] 1x Calculators&Writing Tablet, 1x User Manual,1x Stylus. We are always here to provide you 24 hour service support ! Product Functions: ●One click instant wipe The calculators has a one-click erasing function, you can write and doodle repeatedly. ●Large LCD screen The large LCD screen display, and the data is clear and easy to read, which is an ideal choice for study and work. ●Magnetic stylus The stylus is magnetic and can be attached to the storage slot to prevent loss. ●Pen pressure sensing detection function The stylus has a pen pressure sensing function, you can draw thick or thin lines at will according to the pen pressure. ●Dual Power Solar panel + 2PCS Replaceable button battery (No need to install screws, can be replaced at any time) ●Portable & Compact Easy storage, easy to carry. You can put into your pocket. ●More Sensitive Key Adopt premium plastic material key, which makes it more sensitive and more precise than silicone key. Comfortable to touch. ●It is suitable for use in Home/Work Business/Offices/School/College/Researchers/Students/Teachers. ●Product Size: 160mm x 78mm x 16mm(6”) (Unopened status)