12-volt DC converter for the AirMini™ CPAP machine. Allows the AirMini machine to be powered by a DC power source. The ResMed AirMini™ DC/DC converter is used to power the ResMed AirMini™ and is only compatible with this device. It allows the ResMed AirMini™ CPAP machine to receive power from a cigarette lighter socket or a 12/24V DC port in most vehicles.