1.streamlined nappearence : looks like a beautiful queen
2.Special oxidation treatment: never off paint
3.locking button:can be locked when you don’t want to smoke
4.non-pressure welding,more permanent
5.protective tube:can be auto repaired when the battery broken
6 .metal suction nozzle
7.The atomizer can be washed
8.variable voltage from 3.0v-6.0v
9.Customed accept