Name: Portable LCD Writing Tablet Size: 150*90*15mm Comes with a calculator from this book: Have you ever encountered such problems: During the calculation process, you need to remember the result of a number, but cannot find paper and pen to record it? This financial calculator is equipped with an LCD writing tablet to perfectly solve this problem. Silent Design and Memo Lock Function: The small calculator button uses high-quality silicone, comfortable, waterproof, sensitive, noiseless, does not disturb others, the "lock" key can record important notes to prevent deletion. The basic calculator is the perfect choice for leaving a message to your children and yourself, and performing the four-function mortgage calculator and tax conversion for finance, office, accounting, schools, and families. The LCD screen uses blue light to protect your eyes. The writing tablet with one-click erase function can be rewritten 50,000 times. There is no need for calculation paper, no ink, and no dust. Reduce paper consumption and protect the environment.