The surface that makes contact with the screen is coated with a thin layer of vinyl, which protects the display without interfering with the electrostatic conductivity
If you've ever tried to create a work of digital art on an iPad then you may have suffered the frustration of not being able to see exactly what's going on directly beneath your finger. Even a stylus can't offer an ideal view of the exact edge of those thin outlines. Looking somewhat like it should be in the hands of a dentist, the oStylus solves this by giving tablet artists a porthole to the screen beneath. There's no need for cables or driver software, the capacitive screen for which this device was designed simply registers the flat disc at the end as though it was a human digit.