Rhythm Healthcare P2 Portable Oxygen Concentrator

PRODUCT SPECIFICATIONS: Compact and lightweight. Conveniently charge a backup battery while the device is in use. Charging time 2.5 hours. (additional purchase).  High efficiency, low noise. Excellent heat dissipation. 93% O2 concentration. High absorption sieve bed. Equivalent to up to 5L. Includes AC/DC Car Charger. Meets FAA travel requirements. Flow settings 1-5 Product weight: 4.37 lbs Oxygen concentration: 87%-96% Warm up time: 2 minutes Rechargeable battery: 14.4VDC Dimensions: 3.3" W x 8.7" D x 6.3" H AC power supply: 100-240v, 50-60hz (auto sensing to allow for worldwide use) Designed for 24/7 use Simple to control functions and easy-to-read LCD display Three year warranty (excluding battery and sieve bed)