This model is HDTV, the technology used to broadcast television signals. (Broadcasters Higher resolution than traditional television broadcasts The signal transmission will be a digital system that provides clarity in both picture and good sound. Can provide a maximum resolution of 4K with no flickering of the image signal. GL-403 HDTV provides image resolution and surround sound system. Compatible with other devices to their full potential such as game consoles, computers, TVs, DVD/CD players, ANDROID BOX.