1. Adjustable pressure control: Round vacuum pressure gauge for intuitive display of negative pressure values, allowing patients to adjust the suction pressure according to their needs. Maximum negative pressure >0.075MPa, with a wider pressure adjustment range for faster and more thorough sputum suction. 2. Hidden largecapacity reservoir: 1000ml capacity reservoir with a concealed and embedded design, innovative structure, round vacuum pressure gauge, and an allplastic shell design. 3. Soft PVC material: The sterilized, qualityassured suction tube is made of soft PVC and comes in sterile disposable packaging to prevent crossinfection. 4. Upgraded noise reduction technology: Builtin silencer multilayer noise reduction technology ensures noise levels below 65 decibels, providing a quiet and comfortable environment for the whole family.