Compact and space-saving laboratory shaker in changeable rotary, elliptical and reciprocate motion for mixing, extracting and stirring of samples. Stable and high torque shaking power and speed with the DC brushless motor. Shaking frequency and timer are dial setting and digital display. Shake pause function, timer function and constant operation by one switch. Selectable mixing, extracting and stirring patterns when used with different shaking stage and racks (optional item). Can be placed inside IN604W incubator for shaking incubation. Shaking frequency 20~200 rpm. Shaking range 30mm.