I opened it once after purchasing it, but I no longer need it, so I'm selling it. Maspro's terrestrial digital (UHF) tabletop antenna (built-in booster). For indoor use. For horizontal and vertical polarization. Use in areas close to a broadcasting tower where strong radio waves can be received. Silver design antenna that harmonizes with TVs and computers. AC adapter included. Model with a built-in booster in the UTA2 Optimal for distributing to multiple rooms or when the lead-in cable is long For strong electric field areas *1 (antenna output level of 65dBμV or higher *2) Reception may not be possible depending on the building's structure and installation location. 75Ω output cable (approx. 1.5m) with antenna plug AC adapter included Radio waves cannot be received properly unless the included AC adapter is connected. The guideline for strong electric field areas is a place where the broadcasting tower is visible. Even if you are close to the broadcasting tower, if there are obstacles blocking radio waves and the reception level is low, please use an antenna for medium electric field areas.