This 80-Watt Power Supply can be used with any 60 Series System One CPAP or BiPAP machine regardless of whether a heated humidifier and/or heated tubing is currently being used. Rated from 100-240 V, 50-60 Hz and can be used without a voltage converter in most countries worldwide. The power cord/cable, which plugs into the wall, is not included. If you are missing that cord please see Cord Part 1005894 elsewhere on this site. Works with the System One REMstar SE and all "60 Series" System One CPAP & BiPAP machines: REMstar Plus 260, REMstar Pro 460, REMstar Auto 560, BiPAP Pro 660, BiPAP Auto 760, etc. It will not work with older "50 Series" System One machines such as the REMstar Plus 250 and the REMstar Auto 550. Parts for "50 Series" machines are available elsewhere on this site. 60 Series System One machines include reference numbers on the base of the machine that end in 60. For instance, 560P appears on the bottom of all 60 Series REMstar Auto machines, 460P appears on the bottom of all 60 Series REMstar Pro machines, and so on. The 50 Series System One machines include reference numbers on the base of the machine that end in 50. Therefore 550P, 450P, 150P, etc would all indicate 50 Series machines.