GAOMON S620 6.5 x 4 Inches Digital Tablet

It is a battery-free stylus which adopts the most advanced passive technology, no battery and no charging required. This environment-friendly pen, allows constant uninterrupted drawing and playing, avoiding the low power interrupting your operation. And comes with 2 programmable express keys, one-click toggle allows you to switch the function between brush and eraser constantly. (8 Pen Nibs)-- Extra 8 nibs are included for replacement.