The ISG® Hotplate and Magnetic stirrer is stainless steel with ceramic coating resist corrosion. It also has separated safety circuit which will automatically stop heating when temperature reaches 350 degrees. The variable speed motor is designed to stay at a constant speed even during change in load. High magnetic adhesion ensures that the stirrer bar stays stable at the bottem of the container. The ISG Hotplate Stirrer features an enclosed assembly with protection class IP42 and a DC brushless motor which guarantees long product life. Reasons to buy: CE Certified, Detailed instruction manual, Trusted ISG Brand, Portable, Easy to use.