The Benchmark Scientific BT1502 Orbi-Shaker MP is designed with a 3mm mixing orbit, optimized for thorough mixing of microplates and/or PCR plates. Up to four plates (standard or deep well) can be placed on the included platform and are instantly secured without the use springs, clamps or tools.|A digital microprocessor ensures accurate speed control over the brushless, maintenance free motor drive and both speed and time can be viewed simultaneously on the large LED display.