This transformer is the only item you need to spend money on to make your own High Definition Digital Antenna. Just take a stick, old hangers, any metal tube and this .49 cent transformer and hook it to your to. I got more and better reception with this then I got with my $69 8bay roof antenna and my cheap $15.99 attic rotor antenna. This is not a joke, don't waste your money on paying of Dish/Direct/Cable etc or store bought antennas. This also works well hidden behind the TV, just aim in direction of broadcast towers. This is bi-directional, received from two directions at one time. Be sure to run to select source on your tv and run scan to pick up channels. There are all scams for something that is free. Enjoy.