Three interchangeable platforms (available separately) accommodate a variety of sample containers to make the Orbit 300 a truly multipurpose shaker. The flat platform, with nonslip rubber mat, holds plates, dishes, boxes, etc. The microplate platform will accommodate up to four deep well microplates. The clamp platform has spring loaded retaining bars that hold flasks, bottles, racks, etc. in place. Time and speed are set and displayed on the large LED. The broad speed range allows it to be used for gentle mixing as well as vigorous agitation.