Double electrical bust pump, knapsack style. I've utilized this for 2 infants, so the backpack is damaged but the pump has and is a beast been a trusty friend for feeding my children. You might always put the pump on a new bag if you 'd like. You will require to buy the standard accessory kit with the hoses, cones, etc, as I think it's gross to recycle another person's milk parts lol (And any lactation consultant will certainly inform you the exact same thing:-)) Also includes 2 packs of non reusable nursing pads and steam clean bags for sanitizing. $40.