2 in 1 , Automatic(suckle-release cycle) and semi-automatic(suction maintain with manual release function). Suction levels can be adjust, make the pumping more convenience and comfortable.Automatic function can stimulating babies suckle(suckle-release). saftety and comfortable without pain. Ergonomic breast shield can prefectly attach with breast, makes more milk flow.Light weight design, can be operate by one hand; strong suction, easy operate, fastly reduce breast swelling.Power supply can be use by adapter or batteries. 110v~240v power supply.Breast shield can stimulate breast, which provide more milk flow.New apparance, light weight design, easy to carry; using auto-electric control, long motor life, easy to maintain.