Medi Cal Instruments is a U.S. based company specializing in the design and manufacturing of Biomedical Function Generators and ECG Simulators.Medi Cal Instruments has been serving our customers since 1976. All of our products are manufactured in the USA. Medi Cal Instruments will repair or replace any simulator or generator which proves to be defective within the warranty period. Permission must be obtained from Medi Cal Instruments before returning any device. In no event shall Medi Cal Instruments be liable for consequential or special damages of any kind. Under no circumstances shall this instrument be used in a life support application.