Nowadays, people are increasingly dependent on the Internet. Whether it is online shopping, social networking, office, mobile payment, access control, etc., they are inseparable from the Internet. Fortunately, we have installed broadband in every family and handled traffic packages on mobile phones. However, in some scenes where there is no broadband but many people need to surf the Internet (such as in the car, traveling, group business trips, exhibitions, etc.), the traffic of mobile phones can only be a drop in the bucket, so starting with a portable WiFi is really a good choice.