This is the original equipment power supply for the Respironics "Legacy" or pre-M-Series BiPAP machines. This power supply will automatically adapt to both U.S. 110v current and international 230/240v current. It draws 60 watts and supplies the correct 24V of power to the machine.
This power supply will not work for the newer Respironics "M-Series" machines. It is not designed for use with DC Battery systems - see the REMstar DC Power Cable for connecting your machine to a 12V cigarette power supply.