Once inserted into the pencil, the device starts auto sharpening, auto stop and auto release the pencil at a perfect nib to prevent over-sharpening, by which you can save the pencil for a longer time using as well.
With light press to start sharpening, about 4 S the pencil sharpened. This sharpener works well for coloured pencils, lead pencils, charcoal pencils.
Power by Li-ion battery with over-charge and over-discharge protection. The battery level indicator displays the real-time status of your device.