Reproduces digitally stored heart sounds, murmurs, and breath sounds. These sounds are heard with stethoscopes from Sounders, either the two mounted in the top or from other Sounders, with up to 50 connected at the rear panel jacks. Menu items that are selected from the 16 button keypad have their number digitally displayed adjacent to the keyboard. Arrhythmia menus may also be displayed on patient monitors. Comes with two built-in Sounders plus two extra Sounders. Uses Plug-In Modules 1-10 (not included). ECG monitor not included.