The Benchmark Scientific C2212-E MyFuge 12 Plus has a unique design that eliminates the need to switch rotors (or use a separate centrifuge) when changing between microtubes and PCR strips. The included, COMBI-Rotor allows for simultaneous centrifugation of up to 12 microtubes and/or 4 PCR strips. The C2212E has an American plug measuring between 100-240V. In addition, the MyFuge 12 Plus features a large digital display with adjustable speed (up to 7,000 rpm) and a digital timer. With built in rcf conversion, speed can be set/displayed in rpm or rcf.