Official stats here : https://store.acer.com/en-us/27-predator-gaming-monitor-xb271hu-bmiprz
I am original owner, got it back in 2018. Works fine, just don't need anymore. Top of stand is missing the cap, but don't really ever notice it unless you're looking above and behind it.
Screen: 27" (2560 x 1440)
Panel Technology: IPS
Inputs: DisplayPort, HDMI, USB 3.0
Response Time: 4 ms
Brightness: 350 Nit
144Hz refresh rate (144 Frames per second)
NVIDIA® G-SYNC™
I don't have original power cable, but can provide what I used as well as the DP cable if you need one or both.