3 In 1 Design: The solar calculator is equipped with a notepad and a stylus. You can take notes while calculating without paper, which improves learning and work efficiency, saves your time and is more convenient. Dual Power & 12-Digit Display: This is a calculator supports battery and solar power, with two power supply methods, it is more suitable for long time use. The solar calculator is equipped with a 12-digit display and a LCD writing board. Portable & Slim: This upgraded calculator is slim and light (only 4.05 oz). Folded design protects the scratch pad and is easy to carry. You can put it anywhere such as schoolbags, briefcases, pockets, etc. Mute & One-key Erase: This desktop calculator uses silicone buttons to keep silent during use. There is a button at the bottom of the writing tablet to clear the screen. Multi-purpose Calculator: This multi-purpose calculator can be used as a calculator, and can also be used for drawing exercises. It is simple to use, suitable for students, teachers, and business personnel. color:Black Material:ABS size:160 x 78 x 12mm Package Contents: 1 x Calculator With Notepad 1 x English manual 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. 3 In 1 Design: The solar calculator is equipped with a notepad and a stylus. You can take notes while calculating without paper, which improves learning and work efficiency, saves your time and is more convenient. Multi-purpose Calculator: This multi-purpose calculator can be used as a calculator, and can also be used for drawing exercises. It is simple to use, suitable for students, teachers, and business personnel. Dual Power & 12-Digit Display: This is a calculator supports battery and solar power, with two power supply methods, it is more suitable for long time use. The solar calculator is equipped with a 12-digit display and a LCD writing board. Mute & One-key Erase: This desktop calculator uses silicone buttons to keep silent during use. There is a button at the bottom of the writing tablet to clear the screen. Portable & Slim: This upgraded calculator is slim and light (only 4.05 oz). Folded design protects the scratch pad and is easy to carry. You can put it anywhere such as schoolbags, briefcases, pockets, etc.