Calculator with Notepad:Calculator can do more than just calculate,the writing tablet with stylus pen can record what you want.This desktop calculator supports calculations with up to 12-digits,the data is clear and easy to readtax calculation can be quick and easy. Lightweight and PortableThis pocket calculator weighs only 260g and portable design is easy to carry. It has one button battery and can be replaced any time without screw installation,you don't worry about the battery dying anymore. Healthy and Eco-friendly:The blue light-free LCD screen is used to protect eyes,when you are not using the basic calculator,you can put it on your desk as a notepad.It can be written repeatedly, reducing paper consumption and being eco-friendly.There is no need to use shredder to process the paper and it's a perfect office calculator. Mute Design:Our desk calculator adopt high quality silicone button,which can bring you more comfortable touch and a quiet experience.When you are calculating the data,the mute button will not disturb others, suitable for working and learning. 1-year Extended Warranty:The product has 1 year extended warranty and detailed instructions,it can be replaced directly if there is a problem within the warranty period.You can contact us at any time, we will reply within 24 hours.