One For All signal boosters couldn't be easier to use. Connect it to your wall socket & within seconds begin to enjoy crystal clear reception from your TV or Radio. Built with 1 Output. Designed to boost your TV & Radio reception in poor signal areas, amplifying the signal by 23d B & ensuring the maximum number of channels are available to choose from. One For All Signal Boosters have a built in 3G/4G LTE block filter to protect your TV/set-top box (STB) against interference from smartphones, tablets & transmitters.