What's Your Favorite Chrome OS Peripheral?S

Sometimes the integrated inputs on your Chromebook just simply aren't good enough (looking at you, Chromebook 11 trackpad). But the OS is still new enough that not many major manufacturers directly support it. Sure, Chrome OS is supposed to be plug-and-play compatible with any USB HID peripheral, but this nest of un-pairable wireless mice on my desk suggest otherwise.

Have you found an external keyboard, mouse, display, or other peripheral that not runs circles around its built-in counterpart but is also detectable by Chrome? If so, tell us all about it in the discussion below!