The ALISS Double Breast Pump is electric and comes with the revolutionary 3D Soft Breast Shield with 3 functions that Stimulate, Suck and Squeeze. The unique 3D design of the Breast Shield reacts to the pumping rhythm which mimics a babies suckling motion and provides maximum comfort and stimulation. The ALISS is safe, powerful and efficient. Power is maintained when both pumps are used simultaneously without any suction reduction and is highly efficient in establishing breast milk. It is a Closed System breast pump (with anti-backflow) which prevents breast milk residue gathering in the tubes or motor, as milk residue can cause contamination. The ALISS offers individual controls for the left and right breast allowing you to express using both pumps adjusting the suction levels separately. It has double-pumping ability allowing you to choose from single or double pumping. Touch Screen Technology allows mothers to conveniently navigate the digital controls and visually monitor the dual phase expression mode. With 9 adjustable suction levels, 2-Phase Expression – Stimulate and Express, this pump will automatically change from stimulate to express after 2 minutes without having to press a button.