The electric breast pump is pain free; it can control the suction and adjust the strength freely. Double Breast Pump. With the T-tube, you can use it as single breast pump or double breast pump for your needs. The sound of the breast pump is only 40-50 decibel which is lower than the voice of normal speech. Portable. It can be connected to the power bank by the USB cable. Thus it is convenient for you to carry it everywhere. BPA Free. Made of PVC raw materials, contains no harmful substances. Note: Before using the breast pump, disassemble all the parts, clean them with a dishwasher or neutral detergent, (Do not use sterilants or detergents to wash it) then sterilize them in a steam sterilizer or cook for 5 mins in boiling water. With the electric double breast pump, it requires less effort than manual pump. And save your time. Material: BPA Free, PVP material. Color: white Milk Bottle Size: 2.28"*3.14"*7.24" / 58*80*184mmMachine Size: 3.74"*3.35" / 95*85mmPackage weight: 0.52kg / 1.15 lb Package Contains: 1 x Main Body2 x Milk Bottles2 x Three Channels2 x Silicone tanks2 x Three Channels Covers2 x Straws2 x Duckbill valves1 x Cable