15 hr battery operation new lightweight 2.2kg pulse-wave technology it has auto, active and sleep mode. Supplementary battery, protective bag & 4way strap, mains power & in car charger, spare filters, nasal cannulas accessory bag and instruction manual. 1to3 litres per minute on-demand oxygen. Airline Approved. Amazing value.
(Only used for 6weeks) my mother found this concentrator Amazing, lightweight and so discreet and allowed to travel abroad with ease.