The Maxi-Mix Plus is designed with a heavy cast aluminum body to provide optimum stability on the bench top. Equipped with a single tube mixing cup for mixing one at a time. Operates at a fixed speed of approximately 3,000 rpm, to ensure fast, uniform mixing of contents in test tubes. The mixer has two modes of operation: Continuous operation when you need to mix a quantity of tubes in sequence. Intermittent operation, which is activated by touching the cup attachment with a test tube. Supplied complete with a single cup attachment and a power cord and plug. 110V, 50/60 Hz. (M63215)