1. The "dongle" is a ticket grabbing software developed by Mo Brothers, which is divided into three versions: primary, middle and advanced.
2. The advanced version of "dongle" has the functions of ticket refund, automatic reservation for ticket grabbing, reminder of successful ticket grabbing, SMS notification, etc.
3. The booking time and 12306 website time are accurate to milliseconds. You can circle all the tickets of a passenger train within a few minutes, and you can book up to 100000 tickets a month.