GN Otometrics ICS Chartr NCA-200 Air Caloric StimulatorDescriptions This listing is for a GN Otometrics ICS Chartr NCA 200, an air caloric stimulator designed for vestibular testing and diagnostic procedures. This system is typically used in audiology and balance clinics to assess vestibular function through controlled air stimulation of the ear canal. The unit is being sold as is, without accessories, and has not been evaluated for functionality. Please refer to all images and details before purchase.