Inogen One Rove 6 Portable Oxygen Concentrator, Certified Pre Owned 1118499 Wireless 4G LTE cellular module GEN4880A Wireless 4G LTE cellular module for 3B Luna II CPAP and APAP device Overall Height: 51" Pulse Flow Settings Standard 8 Cell Battery Extended 16 Cell Battery Setting 1 6 hours and 15 minutes 12 hours and 45 minutes Setting 2 5 hours 10 hours and 15 minutes Setting 3 3 hours and 15 minutes 6 hours and 30 minute Setting 4 2 hours and 15 minutes 5 hours and 15 minutes Setting 5 1 hour and 45 minutes 3 hours and 30 minutes Setting 6 1 hour and 15 minutes 2 hours and 30 minutes 16 Cell Battery Battery Duration Up to 6 hours 15 minutes with standard battery