INOGEN Inogen One Complete Portable Oxygen System Code: INOGEN-1 Price: $3,995.00 Quantity in Basket: none Includes the Oxygen Concentrator, *2 Batteries! AC & DC Cords, Cart, Shoulder Bag, & Cannula Complete Portable Oxygen System (like above) Code: INOGEN-AARP Price: $3,595.00 Quantity in Basket: none AARP/AAA Discount On the Inogen One Complete System. You MUST be an AARP or AAA member for this price