This Universal Power Supply with AC Cord is specifically designed for use with all Inogen One G3 Portable Oxygen Concentrators. It provides the precise current and voltage required to safely power the oxygen concentrator. This Universal Power Supply automatically adapts to input voltages from 100V to 240V (50-60HZ) permitting use with most power sources throughout the world. (A plug adapter may be needed to convert plug connectors for usage outside of North America.) The Universal Power Supply WILL charge the Inogen One's Battery whenever it is plugged into an AC power source regardless of whether the unit itself is currently turned on. (Due to power limitations on most commercial airlines, the Universal Power Supply generally cannot be used to charge the Inogen One Battery when used on an aircraft