Delivers 0.5 to 5.0 liter per minute of continuous flow oxygen at the highest purity levels. autoFLOW technology will reduce power consumption by around 15% when operating at 2.0 LPM. ultraSilent technology produces near silent operation of around 40 decibels of sound level. Easy to read LED hour meter that displays diagnostic alarm codes. Compact and slim; easily fits in most home environments. Includes durable wheels and an integrated top handle. Cannula barb and a front-loading humidifier bottle area for easy access and a secure attachment.