Feature – more natural to use – this pump is specially designed to collect the leaking milk while nursing on the other side. It pumps out the milk from your breast by the natural pressure. Soundless while pumping – your baby deserves to have a quiet moment instead of the noisy motor sound while nursing. Especially soft and comfortable – built-in soft petal-shaped silicone, trumpet fits more tightly and does not leak, which makes sucking thoroughly and comfortable. Perfect for traveling – this compact pump is perfect for flight trip, hiking, family bbq, fishing, camping or other outdoor activities. You do not have to worry about running out of the batteries or breaking the pump accidentally on traveling. Specification – capacity – 5oz /150ml. Instructions – Clean the pump and lid with water. Wash by hand or dishwasher (recommend to put it on the top rack of the dishwasher). Sterilize the pump in boiling water for 3-5 mins, do not steam or microwave. Adjust the pump and put your nipple towards the center of the pump. Squeeze the center of the pump and release it to create a suction to attach the pump to your breast. That’s it and let the pump do the rest. Cover the pump with lid to prevent any dust to go in. (Please note that the lid is for covering purpose only and it is not 100 percent leak-proof. ) It is advised to pour the milk into the bottles or storage bags for better storage. Tips – massage your breast with a hot towel before using the pump would help the milk to be released quicker and easier.