The Voice Profiles are actually stored in the database and not the headset, so the good news is there is no limit. In theory you could have over 1,000 different users with just 1 headset. The most I have seen is 36 different users (different voice profiles) at 1 office location. We typically see 1-3 users per workstation or per headset if hygienists share rooms. In theory there is also no real limit for the number of charts a patient can have, or no limit to how many total patients a dental office can have. I think with the SQL type database we calculated you should be able to easily store 6 million charts and that would average 6 charts per patient, or 1 million different patients for a very large database. The most charts I have ever seen for 1 patient was 62 charts for an office in Japan where the patient had 62 charts. They were charting every month for over 5 years.