size: 215 x 158 x 13mm Material: ABS colour: black Package Contents: 1 x Calculator with Notepad 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.Healthy and Eco-friendly : The LCD screen of is designed by no blue light that protects your eyes,The writing pad with One key clear function supports reusable writing 50,000 times and calculator paper free,no ink and no dust.Reducing paper consumption and being environmentally friendly. 1.Calculator with Notepad:Have you ever been trouble that you had to remember the result of a number during a calculation,but couldn't find paper and pen to record it? This finance calculator is comebining with lcd writing board which can solve this problem perfectly.It is designed by a Japanese which pursuing and paperless eco-friendly.You can take notes while calculating,calling and meeting,which improving your study and work efficiency. 2. and Portable:This mini calculator weighs 210g and have a flip cover that can be protecting the keyboard.You can put it in your pocket and bag.It is portable that you can carry it to anywhere and can be removed and used immediately when