Signal Booster, TV Single Output Amplifier 27828HSR With Integrated 4G Filter - Improve Picture Quality And Channel Reception - Boost Your HD TV/FM/DAB Signal. 1 Way - For HD and Review, Black is renowned for producing high quality electrical accessories and signal distribution products. boosters have a number of features that assist quality distribution of your TV and/ or radio signals around your home, including: 1) More efficient switch-mode power supply - these run cooler saving energy whilst also making them safer in your home 2) Improved gain flatness delivering a better balance across the performance range 3) Lower noise figure for optimum picture and sound quality 4) Greater signal handling capacity to cope with more channels 5) 4G filtering - provides a typical 45dB protection from 4G mobile phone signal interference 5) Coaxial connectors - simple to plug in to standard aerial connections. Signal boosters are easy to install and incorporates the latest technology for energy efficient, long term, continuous use.