Scientific calculator and notepad are designed as one, you can take notes while calculating, improve study and work efficiency. It is a great school supplies for beginners and teachers. It's a calculator with a writing pad, foldable design, and weighs only 4 ounces. It's so small that you can put it in your pocket, take it out quickly when you need it and use it right away, convenient for taking notes calls and quick notes on your phone. Rewriteable, reducing paper consumption and environmental protection, no need to use a shredder to dispose of paper. Quiet Design: Using high-quality silicone keys, feel comfortable, suitable for daily computing. The mute button does not disturb others, suitable for office, study and usage scenarios. Colour: Black Material: plastic + silicone Package Contents: 2 x Scientific Calculators 2 x pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.