All HDMI inputs are HDMI 2.0 4k ready.
There are 5 HDMI Inputs. 3 on back (1, 2, 3). 2 (4,5) on the side. Looks like #1 supports ARC. No idea if all 1-5 are 4k and HDR. 120HZ?
All HDMI ports are:
HCDP 2.2, HDMI v2.0
600MHz pixel clock rate:
2160p@60fps, 4:4:4, 8-bit
2160p@60fps, 4:2:2, 12-bit
2160p@60fps, 4:2:0, 12-bit