About This Item One-click Lock: The lock key can freeze the content to avoid accidental erase the screen so that it ensures continuous writing or drawing Pen Tray Anti-Lost Design: The stylus can be placed on the side of the erasable tablet through the slider, effectively preventing the loss of the pen One-click Clear: Screen clear can be done with a touch of the button Built-in Replaceable Battery: The 15 inch electronic drawing tablet has built-in 2 cr2016 batteries, which can be used for at least 6 months.
