Bionic pulsation design: The milk liner mimics natural sucking rhythms with a pulsation cycle of 43-46 times per minute, massaging the teat to maintain blood flow and prevent pain or injury for healthier milking. Automatic stop feature: Equipped with a check valve that stops milking when the container reaches 5L capacity, preventing overflow or milk backing up into the vacuum pump for worry-free operation. Food-grade stainless steel construction: Made from 304 food-grade stainless steel with thickened silicone milk tubes, ensuring a clean, hygienic process with safe, non-toxic parts that are easy to sanitize. Portable with folding handle: Features a folding handle for easy carrying and cleaning, along with secure buckles around the lid to prevent spills during transport, ideal for moving between locations. Service: We place great emphasis on our customers' shopping experience. If you have any questions, please feel free to contact us; we will respond to you within 24 hours!