For this purpose, TV anchors and hosts have to read the script, notes, or from a document they had prepared. Along with reading the script they also had to maintain eye contact, without any distraction or knowing to the audience. That is only possible if you are having an Autocue Hire. As we know it's not an easy task to perform, that they have to do both these things simultaneously. But this is possible in a way if they are using proper tools while their presentation or a live transmission.