1,Microcrystal Glass Faceplate 2,High Quality Crystal Plate 3,Stainless Steel Suitable for factory, school, ... 220V\50Hz Dimensions:400*500*150mm Features:Economic efficient: heating with the principle of electromagnetic ,heat faster, thermal efficiency ... such as waterproof, prevent smoke, prevent leakage, prevent dry heating protection ,more safe , electricity -savingIntelligent design: nine gear ...