... burner cooking3.Commercial,industrial or domestic use4.Knob switch or push button5.Size:380×380×190mm 6.Opening size:340x340mm 7 ... , high strength micro crystal glass.3.One type is press button,it can set time controlled precisely,the other type isknob ... .4.Advanced technology:Quote the technology of German Infeneon IGBT module design.5. Safety: Advance microcomputer control system, has no pot ...