Orbit variable speed vortexers are suitable for cold room or incubator use. It features variable speed across a broad range, making them useful for a variety of applications. Both time of operation and shaker speed are set and displayed digitally, with their values on the large 3 digits LED. Parameters are selected with an easy turn knob. These vortexers accept all sizes of standard micro plates, including deep well plates. Retaining springs on the contoured steel platform hold samples in place.