Designed to boost your tv and radio reception in poor signal areas product features boosts your digital terrestrial and cable tv signals with 23db increases channel selection incorporates a unique 3g4g block filter filtering out and blocking unwanted interference from mobile phones prevents poor picturesound quality caused by long cables and or multiple tvaudio sets plug and play fmvhfuhf frequencieschannels frequency range 88 790 mhz iec connectors 1 input4 output power adaptor included