It is controlled by inverter,drven,driven by AC motor.It can be operated conveniently. It has the function of self-balance.It is safe and reliable because of being equipped with electronic lock. It can satisfy the requirements to separate different liquids in thefields of blood bank, foodstuff sanitation,biochemisty,lab,medcal and biolongical products and so on Technical date Timer range 0min-99min Power 220V 50Hz 400W Dimensions 460mmx510x680mm(LxWxH) Weight 90kg