BOOST YOUR SIGNAL: It will boost your TV signals with 23dB (14x amplified), increasing channel selection. PREVENTS POOR PICTURE QUALITY: This signal booster prevents poor picture and sound quality caused by long cables or multiple TV and audio sets. 3G / 4G FILTER: This signal booster incorporates a unique 3G/4G block-filter, filtering out and blocking unwanted interference from mobile phones. PLUG & PLAY: The One For All signal booster is extremely simple to set up and use. An quick setup guide is included in the packaging. DISCOVER ONE FOR ALL: We are the specialist in universal Audio-Video accessories with more than 20 years of experience.