... overflow protection prevents liquid entering pump Model JX820Z AC/DC Aspirator is a novel,portable,AC/DC powered medical suction unit,It is suitable for ... and health care in patient transport and a place without AC/DC.FeatureMaintenance free oil-less pump,high flow rate,without ... oil mist.Powered by three kind of power supply AC,external DC,and internal battery,continuous movement time≥1 hr when ...