Automatically detects pot pressure, locking the lid when pressure reaches 4KPA to prevent accidental opening. Made of food-grade 304 stainless steel, ensuring safety and health without coatings. High hardness, scratch resistance, wear resistance, and resistance, with no precipitation. The protective pressure limiting valve maintains a safe pressure of 80KPA inside the pot. Capable of cooking various foods such as boiled fish, pressed , hot pot, chicken soup, stewed pork ribs, and trotters.