Inogen One G3 Universal AC Power Supply BT026 1 Swivel mask tube that is Invacare Easy Fit Sling Swivel mask tube that is used with both the Nuance and Nuance Pro Nasal Pillow masks The 'around the head' headgear for the Swift FX Bella is an update to the headgear that was introduced with the Swift FX This Universal Power Supply automatically adapts to input voltages from 100V to 240V (50 60HZ) permitting use with most power sources throughout the world 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