Surgitech’s 5L Oxygen Concentrator is a heavy duty oxygen concentrator that uses high quality materials making it light weight, low noise and highly efficient. The concentrator makes sure that the oxygen purity is always in 90%-96% purity while being able to run 24/7 continuously and has a big LCD display. It also as a smart alarm system which alarms you if the oxygen is low, power is down, pressure cycle failure and a compressor alarm.