The DC/DC Converter 24V/90W allows you to operate an S9 device including an H5i and ClimateLine from a 12V or 24 V DC power source in a car, boat, or other vehicle equipped with a suitable battery. Consult you equipment supplier for more information about this accessory. Technical Specifications: Length (connector to connector): 2.3 m Battery Voltage: 12V or 24 VDC Fuse Rating: 20A Typical Current Consumption: 6.0A at nominal 12 V input. 3.0 A at nominal for 24V input. The actual current level will depend on pressure and humidification levels and breathing patterns. Output voltage: 24V, 2.5A Electromagnetic Compatibility: Product complies with all applicable electromagnetic compatibility requirements (EMC) according to IEC6061-1-2, for residential commercial and light industry environments. Information regarding the electromagnetic emissions and immunity of this ResMed device can be fund on www.resmed.com, on the Products page under Service and Support. Click on the PDF file for your language.