Replacement 90-watt external power supply for the ResMed AirSense 10 CPAP machines. The power cord that plugs into one end of the power supply and then to the wall outlet is also included. This 90 Watt power supply is only for AC power sources and cannot be used with DC power, such as a battery. The DC-compatible power cord can be viewed here: Converter for ResMed AirSense 10 CPAP Machines This universal power supply has an input voltage range of 100 to 240V so that it can be used anywhere in the world with just a plug adapter. This product Includes AirSense 10 Series 90 Watt External Power SupplyPower Cord.