A:Answer To get 4k @ 120 fps, you should use an HDMI cable (eARC compatible, V2.0 or later). On your digital device, check that HDMI-CEC has beenenabled. Refer to the owner’s manual of your digital device for more information. If you need any help with our products, please reach out to our Customer Support. https://bit.ly/2zwFkYM.