Product Detail: 1. Screen size 8.5 inches 2. Lock to Save: A single press on the Home (Delete) button to clear the screen to let you scribble over and over again 3. Practical and Economical: The CR2016 button battery in the drawing pad can last for months and it is replaceable. This makes the pad an endless paper sheet and good replacement of the post-it notes/scratch pads. 4. Eyes Protection: You can draw clear thick or thin lines on this LCD doodle board, no fuzzy/leaking, no radiation.