【3 in 1 Function Scientific calculator】Calculator, handwriting board and stylus are perfectly combined. When you need to calculate, you can take notes without paper and pen, and even draw graphs. This excellent scientific calculator quickly improves learning and work efficiency. Our scientific calculators supports up to 10 numerical calculations, and the numbers are clear and easy to read.
【Eye Protection + One-Click Erasing】12-digit LCD calculator screen and LCD writing board, without blue light,which is very friendly to people who use the computer for a long time, and avoids eye fatigue.Just click the clear button to erase the notes and protect personal privacy
【Two Ways to Charge】2pcs CR1120 button battery, one is installed on the calculator and the other is on the writing board, The button battery is plugged and inserted, easy to replace. Our black style scientific calculator is upgraded with a solar charging board. When the calculator battery is out of power, the solar charging board can keep the calculator working normally