Inogen One G4 AC Power Supply Oxygen Concentrator As the air flows to Reusable Respirator As the air flows to the mask the thin outer silicone flap of the cushion seals against the face while the inner wall supports and stabilizes the mask position With the headgear clips removed USAGE: When plugged into wall power this power supply WILL charge any battery installed in your G4 concentrator regardless of whether the device itself is currently turned on This InogenOne G4's Universal AC Power Supply automatically adapts to input voltages from 100V to 240V (50 60HZ) permitting use with most AC (Wall) power sources throughout the world