An Android TV box is an HDMI technology that receives digital signals from the internet and then converts them to analog signals displayed on the TV screen. Thanks to this new technology, you can connect the television with the internet or a gaming console where the images and videos will be played on the TV screen. 

As for the sound signals, you can either rely on the speakers integrated within the Android IPTV box or an external speaker like the Dolby sound systems, soundbars, wireless speakers, and so on.