This is a digital terrestrial TV antenna purchased new on Amazon. I bought it to check reception, but I no longer need it after confirming the reception, so I am selling it. It can receive signals, but unfortunately, it's not as strong as an antenna you'd put on a roof, and there were some stations I couldn't receive (my house is about 20 kilometers from the digital terrestrial TV transmission station). I placed it near a window. The reception strength is low, but I think it can be used if you only need it temporarily. Above all, you don't need to have an antenna installer do the work. A separate USB power supply is required.