If you’re looking for a replacement active pen or digitizer stylus for your Surface Pro 3, Surface Pro 4, Surface Studio, or Surface Book, the Sony Digitizer Stylus / Active Pen VGP-STD2 is definitely compatible but performs unacceptably.
As the product description states, simply install the battery and it will work automatically. My Surface Pro 3 picked it up quicker than it usually does my Surface Pen. When tapping and flicking it works beautifully and fluidly. Unfortunately, it has almost no palm rejection. With a hand on the screen it primarily will not work at all. You will be unable to use it even to tap around while you’ve got your hand on the screen.
While Sony Digitizer Stylus / Active Pen VGP-STD2 is built well and sort of works as a Surface Pen alternative, save your $30.