The professional grade Hercules converter powers devices up to 200 W. To convert voltage and frequency simply select the frequency needed by the device (50 Hz or 60 Hz) from the front panel, then select the voltage required 115 V_AC or 230 V_AC and plug it in. The Hercules reconstructs the mains power line to provide clean, isolated power to the device. The output receptacle is worldwide to accept international power plugs. Built in the USA, the Hercules is manufactured with a quiet Amgis toroidal transformer, providing rugged, reliable power. Hercules includes a universal, medical grade, safety certified wall adapter, grounding wire and instructions.