In addition to simulating heart and breath sounds, this simulator allows the determination of arrhythmias. A perfect tool for Nursing schools, EMS Education programs, medical schools or other healthcare settings where rhythm and sound recognition is critical. 10 different menus for arrhythmia and 11 for heart & breath sounds can be plugged into the simulator, each containing 16 different sounds. Arrhythmias may be viewed on any ECG-monitor by connecting the three snap-on lead patient wires. (If no ECG-monitor is available, please see WLH51035.) The unit includes two built-in sounders and two external sounders so students can auscultate the sounds with a stethoscope. By linking additional sounders, up to 50 students can auscultate at the same time. A speaker may be connected and the unit has a volume control and two LED's that illuminate during systole (heart menu) and expiration (breath menu) as well as an illuminated display showing the example currently playing. The unit comes with a 12 Volt adapter.