1 more convenient, faster to tie the belt. 2. It is best to adjust the tightness when tying the belt. If it is a perforated belt, enter a hole to tighten the waist; Loosen a hole and your pants will always slide down. Third, it is more beautiful. When the perforated belt is used for a long time, the hole will be lengthened and the belt will be deformed, while the automatic buckle belt will not be deformed, which is more beautiful. 4 is the "da da" sound when you fasten your seat belt automatically, just like the bugler's password "ready", which can remind you that you have got up and are ready for work. Therefore, whether in university or in society, there are still many people using automatic belt buckles.