With the splitter, it can serve max 4persons together, more suitable for small clinics, and it can be customized for many industries, such as hyperbaric chamber, glss work etc. Application: clinic, homecare, nursing house, geriatric nursing etc. For the crowd: Geriatrics pregnant women, high mental labor, students, white-collar and people suffer chest distress, lapse of memory, absent-minded, indigestion, bad sleeping etc.