Product Name: LCD Writing Tablet Product Size: 8.7 x 5.7 x 0.18 (Inches) Screen Size: 6.9 x 5.1 Inches( a little bigger than Ipad Mini) Weight: 3.9 ounces Input voltage: 3V Frequency:1Hz Rated power:18mw Waterproof level:IPX5 Features: LCD Writing Tablet uses high technology flexible liquid crystal technology´╝îdepends on the pressure sensing to display text, pictures and graphics. It can be erasd over 500000 times. You don't need to use an eraser, just press the button, the screen will be clean again. Save much much paper! Save many many trees! It's very thin, just 0.18 inch thickness. It's very light, just 3.9 ounces. Hot to use: Just use the plastic pen to write on the board, or use other small plastic material. Then erase with the button. Package: 1 LCD writing board 1 writing stylus 1 battery inside 1* Magnet 1 colorful packing box. Kindly Reminding: The cell battery can be used for 50000 times. If no battery, you can change it easily.