TCL's website doesn't state the Hz but says that the HDMI 2.1 and 100CMR is compatible with the latest gaming consoles.
https://www.tcl.com/au/en/products/p725/65P725.html
Note that these are not brand new. Seller's description says: "Used Only 2 Days. For Grand Prix and pack like new manufacturers warranty 3 years"
The link you've provided is for TCL TS3010 160W 2.1 Channel Soundbar with Wireless Sub Carton Damage Only