Set-top boxes require users to go to telecom or radio and television business halls. Set-top boxes that can be bought outside cannot be used (except for designated authorized points of radio and television). There is only one standard-definition set-top box for 400 yuan, and the annual subscription fee is tens to more than 100, depending on how your local radio and television station manages the set-top box (the management methods in different regions are different, subject to the local).

Digital video conversion box (STB), usually called set-top box or set-top box, is a device that connects TV sets with external signal sources. It can convert the compressed digital signal into TV content and display it on TV.