At present, there are three kinds of viewing cards: positioning card, cracking card and unlocking card.

Positioning card: it can only be installed and used in rural areas where installation is allowed. If you need to transfer in the future, you must re-open the card authorization;

Cracking the card: In fact, the viewing and positioning module inside the machine has been reformed to realize non-positioning installation and use. However, this kind of machine is controversial and its stability needs to be evaluated.

Unlocking card: the viewing card directly unlocked by the direct broadcast satellite management center in the system, which can be used for long-term and stable non-positioning viewing in desert, grassland, mines, offshore fishing boats and other areas without cell phone signal coverage. According to the test, this machine can also be watched normally in Hong Kong, Macao and Taiwan.