This is for wall mounting that new TV or recently moved TV in it's new home. TV size covered over up to 42". If your TV is larger than this, please look at the TV Mounting & Setup - Concealed Wire (42" & Larger). It's a little more money, but we send (2) Techs so we can protect People, Equipment, small pets and the like. All IN-WALL wiring is priced for running inside a single stud bay. We can go further, but a ON-SITE Consult is recommended to spec out the project beforehand.
Also, be aware that concealing the wires in the wall require special cords, an electrical outlet behind the TV mounting location, and a proper bracket. All these thing are not included in the price. An alternative option is to not place the wires in the wall, but instead to use a track to wire track cover. You can find more info about this type of install here.