This portable phlegm suction machine is designed for patients who have difficulty removing phlegm due to illness, coma, or operation. It's a commonly applied medical device for use in emergency rooms, operation rooms, and for nursing in sickrooms and home healthcare. The machine features a large flux and low-noise design, making it perfect for smooth removal of fluids such as secretion and mucus from body cavities. The high-quality engineering and premium material allow for a silent suction process to keep patients comfortable and relaxed. The overflow valve helps prevent overflowing from the liquid holder. This product is easy to use and clean, making it a great option for medical professionals and patients alike.