【SMOOTH BREATHING】With its help, elderly people or patients who are unable to effectively expel phlegm for various reasons can safely and effectively discharge secretions from the mouth, nose, and respiratory tract, maintaining smooth breathing. 【ADJUSTABLE PRESSURE】You only need to turn on the switch and use the knob to adjust the pressure from 20Kpa to 80Kpa. The large pressure gauge allows you to clearly see the negative pressure value and freely set the pressure according to your comfortable intensity. 【LARGE DETACHABLE CONTAINER】1000ml large-capacity liquid storage bottle with precise scale lines and split structure for easy disassembly and cleaning of the container. 【COMPACT AND LIGHTWEIGHT】Compact size (14.2×8.6×13.7IN), lightweight (4.5KG), and a sunken handle make it very portable. When not in use, you can also put it in a cabinet without taking up too much space. 【SAFE AND RELIABLE】The negative pressure system design does not generate positive pressure, avoiding harm to patients due to improper or other accidents, ensuring reliability and safety.