Features Uses a unique rotor that accomodates all your needs.  The large rotor can accomadate 8 x 1.5/2ml tubes, 8 x 0.5ml tubes AND 16 x 0.2ml tubes (or 2 x 8 tube strips).  Supplied with 8 tube adaptors to convert the 8 x 1.5/2ml holes to 0.2 or 0.5ml Convenient for one-hand operation The rotor is attached with a clip-on. It is very convenient for exchanging rotors LED displays the rolling speed and time Operation is silent and stable. Maintenance-free motor, that has long life and is safe Multi-purpose to meet different experiment demands ​Specifications 7,000rpm fixed speed 2,600xg RCF Suitable fo 8 x 1.5/2ml tubes, 8 x 0.5ml tubes AND 16 x 0.2ml tubes (or 2 x 8 tube strips) Supplied with 0.2 and 0.5ml tube adaptor Timer range: 5s-99min59s Low noise (<55dB) 175 x 156 x 125mm <1.5kg Supplied as 110V, 220V is available upon request, 50-60HZ Download Manual