Features: 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. Specification: Product material: ABS Product size: 27 x 17 x 1.5/1cm - 10.62 x 6.69 x 0.59/0.39in (length x width x height) Screen size: 14.7 x 14.7 x 20.3cm / 5.78 x 5.78 x 7.99in (length x width x diagonal) Digit: 10 Net weight: 300g / 10.58oz Battery: 1 x 3V 200mAh CR2032 + 2 x 1.5V 70mAh LR1130 Product color: White Package size: 29.3 x 19.1 x 2.3cm / 11.53 x 7.51 x 0.9in (length x width x height) Package weight: 522.5g / 18.43oz Packing List: 1 x Calculator 1 x Writing Pen