Howshow 8.5 inch LCD Pressure Sensing E-Note Paperless Writing Tablet Writing Board Features: LCD Writing Tablet uses high technology flexible liquid crystal technology, depending on the pressure sensing to display text, pictures and graphics, erasing over 500000 times. 1. Erase button 2. Stylus holder(stylus included) 3. Durable, shatterproof plastic LCD 4. Replaceable batteries 5. Ultra thin, only 4.5mm thick 6. Pressure-sensitive writing surface 7. Battery: 1*CR2016 Button Cell(included) 8. Recommended Age: 3+ 9. Application: Office, Family, School Attention: 1. Avoid using in the following conditions: The ambient temperature changes sharply; Above high temperature 40 centigrade; Under low temperature 5 centigrade; Under the strong light; Under ultraviolet light; In the dust in the environment; in a humid environment; The product with water or soaked in any liquid. 2. Avoid contact with sharp objects or sticky surface of the screen to prevent damage; Avoid dropping the product vertically on the ground; Avoid the product by the strong impact of other objects. 3. Please use clean cloth to gently wipe clean. 4. Do not disassemble this product without authorization. 5. Do not use this machine model does not match the cell and the cell is not standard.