Stirrer, Magnetic, Compact, Digital, Low Profile, with Timer, 100-240V, 50-60Hz. The MST is a compact, low profile, digital stirrer with a manually adjustable speed range of 80-1500 RPM. The bright, digital display allows for very accurate setting of the stirring speed which is adjustable in 10 rpm increments. SpeedServo technology provides for constant stirring speeds even during viscosity changes.