Quiet operation w/Pulse-dose delivery & 90% oxygen concentration at every setting. Compact & light at 4.76lb. Includes 8-cell battery, bag & shoulder strap. Up to 4 hours 20 minutes run time on setting 1. Optional 16-cell battery for longer use. Visual & audible alarms for low battery, low oxygen purity, and no breath detected. Simple easy-to-read LCD display. Includes AC power cord & Oxygen Cannula. #33955-Ea UNSPSC#42272202