1. When the writing pad is left for a long time or not used for a long time, the delete button may not be deleted. Please remove the battery, rub it with your fingers, or clamp the positive and negative poles of the battery with a metal object for 3-5 seconds, You can reactivate the battery, do not reverse the front and back of the battery, reinstall it into the writing board and delete it normally;
2. The initial state of the handwriting pad lock button is off, please confirm whether the lock button is turned on for the first use.
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