This is a manual breast pump from Medela. I bought it for myself, but unfortunately, I didn't produce any milk, and I ended up raising my baby on formula, so I hardly used it. I opened it, sterilized it with boiling water, and tried it once. After that, I sterilized it again but didn't use it. - Harmony Manual Breast Pump - Breast milk bottle (150ml) 1 piece - Nipple 1 piece - Handle 1 piece - White thin membrane 1 piece (already attached to the breast pump) - Multi-lid 2 pieces - Bottle stand 1 piece - Calma 1 piece - Box and instruction manual are also included. Personally, it was easy to operate, didn't hurt, and was an easy-to-use product, so I recommend it. I hope you can use it a lot in the future. (^^)