Apple Pencil (1st Gen) with USB-C Adapter

Provides added precision for tasks such as writing, drawing or annotating
Built-in pressure and tilt sensors can detect how much pressure is being applied and the angle relative to the screen, so iPad can tell the difference between a light press, a deeper press and a tilt
Designed along with iPad and iOS, it's precise enough to touch a single pixel, and so responsive that there's virtually no delay between what you draw and what you see on the screen