9400 Laryngeal Strobe Product Usage: The 9310HD is used to electronically record, display, transfer, and store digital video data of laryngeal or pharyngeal structures, and audio data, for medical and pedagogical applications.
Pentax Medical did not always provide transformers with 9175 isolation transformers are used with 7245C, 7245C/E, 7245D, 9200Cs, 9200Ds, 9310HDs, and 9400s computer systems.
Worldwide Distribution - US Nationwide
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-2744-2017