ONiLAB Electric Overhead Stirrer, LED Digital Overhead Stirrer Mixer with Stirring Rod，40L ，50000 mPas ， 50~2200RPM, Aluminum Alloy(Stirrer only, Stand Included)LED digital display of set and actual speeds Speed adjustable from 50 2200rpm with precise speed control Speed maintains as the viscosity changes Rs232 interface to control and document the necessary data Microprocessor controlled safety circuits prevent splashing Specifications: Max. stirring quantity[H2O]: 40L Motor type: brushless DC motor Motor input power: 60W Motor output power: 50W Voltage: 100 240V, 50 60 Hz Power: 70W Image Models OS40 S OS40