Doesn't need an extra power cable!

This dual displayport Thunderbolt adapter worked immediately on my Lenovo laptop. There is no fussing around. The laptop was converted from a 1x 1080p to a 1x1080p 60hz + 2x4K 60hz device immediately. No driver install, no errors, no artifacts, no issues on sleep/wakeup, no issues at all. This behaves like a couple of native displayport adapters. It's a simple device and does exactly what it is intended to do.