Elpro VideoLabs: equipaggiamento Audio-Video. Il miglior Scaler, Extender, Convertitore per professionisti e dilettanti Posted on April 2, 2017 by user CHDD-41AR HD/CV switcher is designed for switching between various HD and Std. sources for sharing TV display. Simply pressing a button on remote control you can select your desired HD/Std. source for display on the TV monitor.