Yes, you can use the 4K iTV Viet box with any TV - new or old. Many customers choose the 4K box because it's faster than the 1K box.
If you have a new TV, the iTV can switch between 720, 1080, and 4K resolutions. An HDMI is included for you to connect it.
If you have an older TV, the iTV box will connect with the included RCA cables.