Timer range 0min-99min Noise <67dB Power 220V 50Hz Circcity power 180w Capacity 15ml*8 Max.RCF 2220xg Timing range 100-4000rpm Rotate speed precision <±20rpm Temperature rise <5℃ Dimensions 380x480x330mm(LxWxH) Weight 25kg It is driven by inverter motor according to Japannese technology. Ituses international standard 15ml tube.It has the function of self-balance.Its noise is low.It can be operated conveniently.The rotor and inner cavity are stainless steel,free from corrosin.The frame is made of high strength steel. It can be used for qualitative analysis of serum, Plsma and medicine for hospital and biochemisty labs.