HELiOS Marathon Portable Liquid Oxygen- Refurbished

Liquid oxygen allows the storage of larger quantities of gas more readily than normal gaseous oxygen. For home use liquid systems consist of a stationary mother unit vessel and a portable flask for holding your ambulatory oxygen. Features No batteries or electricity required. Unit can operate flat on its back, upright or in any position in between. Versatile, Dual-mode pneumatic demand device (PDD) delivers: up to 4 LPM demand flow up to 6 LPM continuous flow Does not emit heat or noise Easy maintenance Efficient-Ultra-low normal evaporation rate (NER) Durable, reliable design engineered to prevent leaks Comfortable padded, slip-resistant shoulder strap Can be worn with a shoulder strap or backpack for hands-free convenience. 1 Year Warranty