Adopting the newest LCD pressure-sensitive technology, This version of screen has been widely praised. It's a simple alternative to pen and paper. You can use Attached stylus or other plastic pens to write and draw, just like writing on the paper. Environmentally friendly and a money saver - you don't need to waste money on papers, pencils or erasers anymore, one writing tablet can repeat 100, 000 times. Suitable for all ages, from young to old. A great idea for toddlers to keep them busy at restaurants, anyone who enjoys drawing Electronic writing board has a lock function. Switch ‘Lock’ button to the right side with lock function to avoid any accidentally erase. Switch ‘Lock’ button to the left side will enable the ‘Erase’ button. Read Less