ResMed's DC Converter allows you to operate your AirSense 10 Series CPAP Machine or AirCurve 10 Series BiLevel Machine from standard 12V or 24V DC power sources like the cigarette lighter power sockets found in most cars, boats, trucks and other vehicles. A DC Adapter Cable, as shown, with alligator clips is also included for powering your sleep therapy device directly from an external battery.