Benchmark Scientific's H2024E Roto-Therm is a rotating mixer that provides a wide range of mixing capabilities with a variable speed control that ranges from 5 to 70 rpm. Suitable for an array of laboratory applications including re-suspension, protein binding, nucleic acid purification, etc. the mixers include interchangeable tube holders for accommodating all common tube sizes from 0.5 ml to 50 ml. The motion can be adjusted from vertical (end over end) mixing, to horizontal (rolling or hybridization style) mixing. The H2024E has a mains voltage of 230 volts and has a EU plug for European outlets.