The DC Converter 24V 90W For AirStart™ 10, AirSense™ 10, and AirCurve™ 10 Machines by ResMed connects the AirStart™ 10, AirSense™ 10, and AirCurve™ 10 to a 12V or 24V battery power source, including the battery used in a boat, car or recreational vehicle. The converter can be used to power the AirSense™ 10 and AirCurve™ 10 machine.