Qualified hand-free sanitizer is useful, and its main ingredient is to have alcohol, which has a disinfecting and sterilizing effect. Hand-free hand sanitizer is convenient and portable for people to use, hand-free sanitizer is not to wash your hands first, then come to use the sanitizer, but when you go out, outside, in the field may not immediately have water, not necessarily have the conditions, then you can use hand-free sanitizer. When you go out with a small bottle, you can use hand sanitizer to disinfect when you encounter dirty times and there are no good conditions to wash your hands when you want to eat outside. Because it has alcohol inside, which itself has a bactericidal effect, such as Staphylococcus aureus, coronavirus, the disinfection effect with alcohol is very good, so hand-free sanitizer is useful.