Made of high-quality material. 12-digit LCD display offers you a high level of comfort. With a 6 inch writing board for taking small notes. Compact design perfect for business in the office and home, also perfect for students at school. Functions: basic arithmetic types [+] [-] [x] [/], root calculation [],percentage [%], 4-key memory [M+] [M] [MR] [MC], sign change [+/-], tax conversion [MU], double zero, backstep button. Power supply: equipped with a USB charging cable that can be charged at any time, ideal for office or desk. Save paper: saving paper is on trend. The LCD board can be erased up to 100,000 times over the service life, which means 1 piece saves 100,000 pieces of paper or 3 trees.