I purchased this but it's unused because I switched to formula right away. I have washed and sterilized it at home just in case. Since it's also been stored at home, I would appreciate it if someone who understands this would purchase it. Thank you very much. Here's a brief description of the product: This is a BPA-free hands-free electric breast pump that can be used for 30 minutes. - Product Name: Hands-free electric breast pump - Brand: BabySmile - Set Contents: Breast pump, accessories (strap, AC adapter) - Features: BPA-free, hands-free, 30-minute use I will offer a discount only for combined purchases ☻ I am selling a lot of baby items, so if you are interested in anything, please feel free to apply for a combined purchase.