One key to clearWriting or drawing with the included plastic stylus, compare with previous version, update version are with thicker writing, more easy to view, easy to write, with lock-protection switch.Erase your writing content quickly with simply one press of erase button. Replaceable coin-cell batteryWriting and erasing more than 100,000 times, battery can be replaced with new ones easily when remove button without function, battery type: CR2025 3.0V. Kick-stand functionStylus can be used as a kick-stand to display your written messages to family, friends and co-workers. Built-in stylus dock provides convenient storage for stylus when not in use.Ultra light-weight, portableIt is 1/5 inch thin and is easy to take with you anywhere you go.