I used it for about a month and sterilized it in the microwave each time. It was very convenient because it's cordless and electric. Operation has been confirmed. I'll include 38 Pigeon freezer packs as a bonus. [Compliant with food sanitation laws] This breast pump has been tested and complies with the standards set by the Ministry of Health, Labour and Welfare. Of course, it's BPA-free. It has 3 modes: massage mode, secretion mode, and pumping mode, as well as 9 levels of adjustment. All parts can be removed for easy cleaning and sterilization. Easy to assemble. Charges via USB cable, with a charging time of approximately 2-3 hours. *Power adapter not included. Can be used for about 3 hours on a single charge, and it automatically turns off after 30 minutes to save energy. Includes a nipple set so you can feed your baby directly after pumping. (Nipple size M, for babies around 3 months old)