Features: 2 in 1 Innovative Design: This calculator is a combination of standard function desktop calculator and writing tablet, it can effectively save your pen and paper, calculate and record the things you want. Portable: Clamshell design makes it easy to carry, you can take it in your bag, pocket or even purse, perfect choice for office business and home use. Rechargeable: 120mah rechargeable lithium battery provides a longer service life. It comes with USB type-C charging cable, great choice for eco-friendly lifestyle. Convenience: Magnetic stylus makes it easy to use. You can write/draw bright and clear lines, simply press on the center button to clear the screen then reuse it. Silent Calculator Keystrokes: Silicone buttons, every click is a kind of enjoyment. While calculating the numbers and formulas, Work and study quietly, dont be anxious to disturb people. Specification: Color: Black, White, Grey (Optional) Material: ABS, Silicone Operating Temperature: 0-4 Power Supply: 3V 120mah Rechargeable Lithium Battery Interface: Type-C Font Color: Monochrome/Bold Handwriting Reflection rate: 25%-30% Product Size: 15*9*1.5cm/5.9*3.5*0.6in (Fold); 18*15cm/7.1*5.9in(Unfold) Product Weight: 135g/4.8oz Pen Length: 12.2cm/4.8in Package Size: 19*10.5*1.8cm/7.5*4.1*0.7in Package Weight: 188g/6.6oz Package List: LCD writing tablet x 1 Calculator x 1 Stylus x 1 Type-C Cable x 1