The M Series oxygen concentrator offers ? 90% of purity with flow rate of 1L/min. The 6kg compact device measures 324x199x320 mm and consumes only 90W power. The modern device runs on (12V) AC/DC power with power selection mode and offers breath forest fresh when you are in house or driving out. Operates silently at most 40 dB to produce 0-1 liter/min with 90% efficiency and 1-5 liter/min with 30% - 90% efficiency. One liter can be adjusted to 5 liter with a simple press.