A removable hair clip for a hair iron, which is used to hold the hair on a heating barrel of the hair iron when setting the hair and is configured to form a removable structure suitable for removably installing the hair clip on the heating barrel, so a user can use the hair iron with or without the hair clip, thereby avoiding an unnecessary interference of the hair clip with the hair. In a preferred embodiment, the meta-stable radicals are generated using a pulsed corona discharge apparatus. Thus, a remote user can update a local call related information system and review past callers to their home or business telephone at their leisure. The opening from which the gas is expelled is positioned directly in front of the flow path of liquid expelled from the feeding channel.