No squeezing, no pumping, just press the button for automatic suction. Compact, quiet, automatic pump controller is designed for one-hand operation and superior suction. Clear cylinder with flanged base and measurements. Flexible, non-crimping, detachable hose. High quality tapered sleeve for comfort and secure seal. Automatic release button. EZ activation power switch. Silicone (sleeve) ABS (cylinder and controller) PVC (hose). 2AA batteries. 7.75"x 2.25"/20 cm x 6 cm.