This is the new version. Normally $139. Other colours available too.
Interact with your computer like never before thanks to the Surface Pen. The Microsoft EYU-00013 is a versatile creation tool that lets you find new ways to express yourself through and on your Surface Pro, Book, Laptop or Studio. The Surface Pen lets you mimic a natural writing experience with 4096 levels of pressure sensitivity so it responds to the lightest touch and it's fast so you can watch ink appear to flow directly from the tip of your pen to your screen, with almost no lag. The possibilities are almost endless - compose a song, create an animation, draw, sketch and even paint. Plus, the Surface Pen allows you to take notes and annotations without printing and wasting paper. When you've finished, the Surface Pen connects magnetically to the side of your Surface device so you won't lose it. Find a new way to create with Surface Pen.
I have one for work, and though it is occasionally useful, the majority of users won't get any value out of it.