The PS-2000 series patient simulators are unique in the marketplace. Three simulators to choose from, PS-2010 is perfect for providing a 10 lead wire hook up for diagnistic 12 lead ECG machines. PS-2006 was developed for 6-lead ECG/PVC simulator. PS-2005 is a small unit for those who need five lead ECG simulation only. Comes with NIST calibration good for 1 year. Product can be re-calibrated via BC Group after one year for a nominal charge.