The HeartMan Infrared Headphones can be used with the SimulScope Auscultation System, Classroom Infrared Emitter, and Auditorium Infrared Sound System. The HeartMan Infrared Headphone works with these systems to allow simultaneous listening for clinical and educational situations. The HeartMan Headphones are an FDA approved product and are used in many hospitals with the SimulScope System. Also 500+ HeartMan Headphones can work together with our 2-Array Auditorium System for use with large classes.  Product Features Excellent sound quality Large number of applications Easy to set up and use Available for large and small auditoriums