Standard S9 Replacement Supply
This is the 90 Watt supply that shipped with the ResMed S9 system, so it is a straightforward swap if yours is lost or damaged.
Universal Voltage for Travel
It accepts 100 to 240V at 50 to 60Hz, so it works on different mains voltages when you travel.
Includes the Power Cord
You get both the power supply unit and the AC power cord, so you have everything needed to plug into the wall.
Old and New Versions Interchangeable
ResMed made a smaller, lighter version in 2013. Both use the same power cord and either works with your S9.