That depends on the vaporizer. Some dry herb vaporizers allow you to microdose including the DynaVap VapCap M and the Mighty (if you use the capsules) right out of the box. Others allow you to microdose if you adjust the bowls (ex. add in a concentrate pad). And there are some where microdosing simply isn't possible - you need to put in a decent amount of herb for it to function properly.