TRUMOM Electric Breast Pump Elite(Yellow/Pink) is the electric pump with 3 Operation phases(Massage Phase, Stimulate Phase, Milk Secretion Phase). Start with our unique “Massage Mode” to make the breast tender followed by “Stimulation Mode” and finally “Milk Secretion”. The Weight of the product is light enough to be carried around and can be used with 4 AA batteries or adapter that is included with the pack. TRUMOM is very comfortable to use, pain free and leak free ! All plastic parts used are 100% BPA free and very safe for your baby.