This foot pedal keeps both hands free to manipulate the 3Doodler pen. It makes it MUCH easier to remove filament when you are done. You can press on it steadily or double-tap it, for continuous flow, just like you do with the buttons on the device. It plugs in to the device using small prongs, fr which there is no storage cover. (As they are small, I am concerned about damaging them, which is why I think they need a cover.) Also, the bottom could use a non-slip pad, so it stays put o hard floors. So it isn't perfect, but it is good to have.
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