If you want the ability to charge the batteries for your ARYA Q Powered By Drive, while simultaneously operating your portable oxygen concentrator, the ARYA Q AC power supply is an essential accessory. With the AC power supply you have the ability to use a standard wall outlet in your home or hotel room to not only power your ARYA Q but also recharge the attached battery. This means you won't have to interrupt your medical oxygen therapy treatment just to recharge your battery. So anytime you are lounging around the house, watching TV or reading a book, position yourself near a wall outlet and plug in. That's it, and your ARYA Q Powered By Drive will automatically begin to charge and still operate no matter the setting being used. This convenient accessory ensures uninterrupted oxygen therapy while keeping your battery topped up for when you need to go mobile.