Product Description: Writing Board eWriter eliminates the need for paper, scratch pads, and sticky notes - simply write and erase. The durable, ultra-lightweight LCD writing screen is engineered to feel just like writing with pen on paper. The image stays as long as you need it to and can be erased with the touch of a button. Create again and again, without the need to charge or connect. Lightweight and portable design makes it perfect for school, office, home use or other use. Features: Pressure-sensitive LCD writing surface makes your writing or drawing appear without any delay. Write or draw with the included plastic stylus or any other suitable instrument, even by your finger 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. Built-in replaceable button cell, long battery life up to 2 years, you don't necessarily worry about power cut. Applications: 1. Paperless: for business people, designers, engineers, teachers, students and doctors, etc. useful and environmental-friendly. 2. Love your family enjoy your life: as a family message board to deliver your love to your family, can be placed on the table and desk. 3. Good helper for students: class notes, drafts, and scientific equations to solve mathematical problems. 4. To win at the beginning: easy to cultivate children's writing, calculus, painting abilities, learn with fun. 5. Unspoken word: light and easy to carry, and can be recycled, can let deaf people communicate easier. Specifications: Material: ABS Power supply: button cell Battery capacity: 75mAh Voltage: 3V Standard current: 0.1mA