*: Easy operation and high efficiency, erase your drawing just by a touch of the erase button. Ultra-slim and compact design, easy to carry and can be easily slided into your briefcase, backpack, or other bag. Lightweight and portable, perfect for school, office, home use or other use. Good helper for students: class notes, drafts, and scientific equations to solve mathematical problems. Paperless: for business people, designers, engineers, teachers, students and doctors, etc. useful and environmental-friendly. Specification: Material: Plastic Power supply: button cell Battery capacity: 75mAh Size: 24.5 x 14.7cm / 9.65 x 5.79inch Handy design for easy use Size Chart: Battery3v210mahincluded Battery Modelcr2032 Package Includes: 1x LCD Writing Tablet 1x Plastic Stylus 1x User Manual Note: 1. Product built-in battery, the same type of battery can be replaced after the end of electricity 2. After use of the battery can not be discarded 3. The product surface can not be used to draw sharp objects, otherwise it will damage the LCD film