Inogen Rove 4 Portable Oxygen Concentrator, 4 Cell Battery

Weight: 2.9 lb (3.1 lb with intermediate battery).
Dimensions: 5.83" x 2.64" x 7.5" (Height includes standard battery).
Oxygen Flow: Intelligent Delivery Technology. Four flow settings from 1 to 4.
Power Settings: AC Power Supply 100 to 240 V, 50/60 Hz (auto sensing to allow worldwide use).
Battery: Up to 5 hours, 45 minutes @ flow setting 1.
Noise Level: 39 dBA @ flow setting 2.
Use: Designed for stationary, portable, and travel.