Product parameters: Specifications :13.5 inch Material: ABS frame LCD display Product size: 29*21*1cm(13.5) There will be a little error in manual measurement Power mode: built-in CR2025 button battery (included) Cleaning: Please wipe gently with a soft cloth Features: 1. With the LCD writing board children can unleash their nature at will enjoy drawing counting spelling anytime and anywhere and no longer make a mess of the floor or walls. 2. The surface of the tablet will generate lines of different thicknesses according to your pushing force just like writing on paper with a pen or pencil. 3. Paperless: Useful and environmentally friendly for business people designers engineers teachers students and doctors etc. 4. Love your family and enjoy your life: Send your love to your family as a family message board that can be placed on tables and desks. 5. Good helper for students: class notes drafts scientific equations solving math problems. 6. Win at the beginning: easily cultivate children's writing calculus and drawing skills and apply what they have learned. 7. Subtext: Portable and recyclable making it easier for deaf people to communicate. Package Including: 1*Drawing Board 1* LCD drawing pen