Yuwell 8F-5A Portable Oxygen Concentrator is a compact and light-weight with 5 liters/minute capacity. It has a built-in LCD display with timer function. This features a self-diagnosis system and comes with multiple safety alarms. Oxygen failure alarm - continuously monitors quality of oxygen generated. Power failure alarm - audio alarm will alert attendant in case of power failure. High & low pressure alarm. Auto cutoff for over-heating. The specifications include Noise level- less than 52dB, Output Pressure- 40 to 70Kpa, Oxygen Output- 0.5 to 5L/minute, Service life- over 30,000 hours.