Operation microscope is an optical microscope specifically designed to be used in a surgical setting, typically to perform microsurgery. Labtech Operation Microscope is designed to demonstrate the operation, theory, repair and servicing of Electrosurgical equipment that used at clinics & hospitals. The unit given the fault diagnosis so as to facilitate the teaching of trouble shooting techniques. A fault simulator is provided with circuit block diagram of the device for the students to study theoretically and experimentally in order to understand the operation of the device.