Packaging, Weight, Cable and Feet
Packaging
Along with the mouse itself, one finds a (charging) cable, detachable side grip, quick start guide, and several information guides in the box.
Weight
My scale shows around 133 g (+/- 1 g), which is exactly what Corsair cites. The Dark Core RGB Pro is no doubt a heavy mouse. It also ends up weighing roughly 10 g more than the Logitech G502 Wireless, which has a comparable feature set otherwise. The Logitech G604, which is powered by an AA-battery and equipped with a metal scroll wheel, weighs roughly the same as the Dark Core RGB Pro. The Dark Core has better weight balance however, so it doesn't feel quite as heavy.
Cable
The included cable (USB-Type C/USB-Type A) is mostly intended to be used for charging as it is very stiff. Its length is 1.75 m (measured).
Feet
The feet on the Dark Core RGB Pro are standard black-dyed PTFE (Teflon) feet. Their glide is good.