P21 & P21SC infrared stylus pens adopt the High Trigger Sensitivity Infrared Pen Omni-direction trigger technology. The pen shell is made of colorful aluminum alloy. Its outlook is straightforward and is easy to use. The self-lubricating pen nib is ultralight and wear-resisting. P21 & P21SC are pressure sensitive. With P21 & P21SC, people can draw lines, click and operate the computer on any display surface.