Wifi box is a kind of wifi router, which has a square shape and is recognized by users by providing customers with free wifi service. Mainly for some physical shops, help small and medium-sized shops to cover the spherical network with a point as the center, with a coverage diameter of about 200 meters. Its main performance is wifi, with wide transmission distance, large carrying capacity, controllable management, self-service Internet access, getting rid of the entanglement of boss's wifi password, and realizing free wifi login only by using your own mobile phone number. For example, in cafes, restaurants, shopping malls, airports, car 4s shops and so on.