Lock key The lock key can freeze the content to avoid accidental erase the screen so that it ensures continuous writing or drawing, you can still erase the content after unlocking to ensure a good writing experience.
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Replaceable Battery Just keep the panel back up, you can complete the replacement for continuous use by removing the battery and replace it with a new one.
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Erase Button One-click clearing, it takes only one second to empty content on the screen, which is convenient for saving time.
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