Adjustable Speed ??Milker: This milking machine is an updated adjustable speed milking machine. It has an adjustable speed vacuum pump. You can adjust the speed according to the flow rate. 3L Bottle: This electric milking machine is suitable for domestic use for cows. The 3 liter bucket is perfect for milking, storing and transporting fresh milk on dairy farms. Also a great gift for your friends and family. Portable: This electric milking machine kit is designed and small enough for easy handling and portability. Food-grade material: All parts of the electric milking machine kit that come in contact with the udder and milk are made of high-quality food-grade materials, which are non-toxic and safe, and will not affect the milk quality. 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!