2 in 1 Calculator & Writing Tablet Design: The calculator is a combination of calculation and notebook with a stylus pen, it allows you to write and calculate simultaneously, making it a perfect tool for busy professionals. Battery Powered: The calculator with time function is powered by 1 CR2032 and 2pcs LR1130 batteries, that assists in managing your time effectively, ensuring that you don't miss any important deadlines or appointments. Healthy and Eco-friendly: Calculator with Notepad is not only eco-friendly but also promotes a healthier writing experience by reducing eye strain and hand fatigue associated with traditional paper and pen writing. Convenient & Portable: It is easy to take your Calculator with Writing Tablet on-the-go, ensuring you always have your trusty calculator and notepad with you. Wide Application: Basic calculator with tablet makes it an ideal tool for anyone who needs to perform quick and accurate calculations, from students and teachers to business professionals and accountants. Battery: 1 x 3V 200mAh CR2032 + 2 x 1.5V 70mAh LR1130 Colour:White&Black Material:ABS+resin Package Contents: 1 x Calculator LCD writing tablet(comes with a button battery 2032) 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.