Max.speed start up 5000rpm,stepless adjusting speed Capacity Horizontal 250ml*4 50ml*8 15ml*28 10ml*36 Max.RCF 3775*g Power source 220V 50Hz 110V 60Hz Time range 0-99min Package Size 67*65*66cm G.W. 66kg N.W. 52 kg Microcomputer controlling ,blushless motor,with electromagnetic lock, digital display speed and time,it can be used widely in hotpital ,bio-chemical lab,and make determination analyzing to blood serum,blood plasma and urine liquid.