Hello, I need a tv tuner for my vizio 4k 55 inch tv in order to watch over the air broad casting (antenna), I'm not sure what exactly I'm looking for so any help on finding a good one for a 4k would be nice, thanks
As far as I know Vizio isn't sold in the UK so you'll need to specify where you are. Different country's broadcasting networks use different technologies and there are different tuners on the market.
If you've moved to the UK after buying the TV then as far as I know there are no free 4K channels. Your main choice would be between Freeview boxes and Freesat boxes - the former uses a terrestrial TV aerial and the latter a satellite dish.
Which box is best will depend on whether you want recording ability or not. Humax are one of the leading manufacturers.