I was using one for both breasts, but one side broke, so I quickly bought a new one of the same type. However, by the time the new one arrived, I was able to fix the broken one, so this one is still unused. The box has been opened once and has a few minor scratches, so I would appreciate your understanding. M5 model breast pump, white with storage case. - Brand: momcozy - Model: M5 - Color: White - Accessories: Storage case, charging cable Thank you for looking.