Highlights of oxygen concentrator do2-5ah: >>three reliable alarm systems: power off alarm, pressure circulation fault alarm and compressor fault alarm >> avg oxygen purity: 95% >> low sound level: less than 45db (a) >> net weight: only 15.9kg (for 5 liters) >> strong abs shell: anti-aging, allows max 200kg stand upon the machine. >> 3 years warranty for each compressor. hz or 110v¡¡§¡è10v /60hz Power consumption:
