A universal interface that will allow the instructor to display arrhythmias on a regular television screen (not included). The ADI is compatible with all makes and models of 3 and 4 lead arrhythmia simulators on the market. The unit has an on/off switch and a freeze button allowing the instructor to freeze the action on the screen, in order to explain the QRS complexes of each rhythm. Comes complete with a 3-lead cable that connects to the simulator and an interface cable that connects to the TV. Can also be used with any of the CRiSis manikins to monitor from the ECG sites. The unit is powered by AC current.