This Ameda pump is so compact it fits into a purse. The patented, easy-to-use design provides control and flexibility simply by varying the frequency and degree of the handle squeeze. The handle assembly eliminates the need for electrical outlets or batteries. The one-hand design allows you to pump one breast while baby nurses on the other, or by using two breast pumps, you may dual pump to save precious time. Both of these methods stimulate the let-down reflex and enhance milk flow. Mothers may also pump directly into any standard baby bottle or freezer bag.