A:Answer Hi Donald, thanks for the inquiry. This TV supports 3 HDMI 2.1 ports that supports HDMI 2.1 features such as 4K120, VRR*, eARC, and ALLM.
Note:
VRR will be available via a future firmware update.
120 Hz is supported by HDMI IN 2, IN 3 and IN 4
AUTO LOW LATENCY MODE (ALLM) is supported by HDMI IN 2, IN 3
VARIABLE REFRESH RATE (VRR) is supported by HDMI IN 2, IN 3
For full specifications, please refer to the link below:
https://www.sony.com/electronics/support/televisions-projectors-lcd-tvs-android-/xr-75z9j/specifications#rfn-1
Hope this helps!
-Sam