The ResMed Air11™ DC/DC Converter allows the ResMed AirSense™ 11 CPAP Machine to operate using 12V or 24V DC power sources. 

This charger converts the common 12V DC power source found in cars, caravans, boats, or other vehicles equipped with a suitable battery into the 24V DC power required by the CPAP machine. This converter can also take a 24V DC power source (found in similar vehicles) to ensure a cleaner 24V DC power output in order not damage the sensitive electronics.

The converter is only compatible for use with an AirSense 11 AutoSet or AirSense 11 Elite devices.