18x20 dish aka tripple sat, its oval, and has thre lnbs on the end with a built in 4 port multiswitch. Relatively common, depends on your market where you locals come from. If they come off the 101, then the dish500 will work fine, just set the tilt completely vertical (this only works if you have the old legacy lnb as was stated above, its small and has only 1 white round tip) then aim it at 101. If your locals come from there then your set, and you have everything, if your locals come off 119 then youll need another trip sat, or phase 3 dish. Best way to tell, whats the current dish on your house look like? (or is it hd)