Black schott glass base this hob has a black schott glass base for durability sustainability and style perfect for modern living 4 heat zones this black glass hob has 4 individual heat zones so you can cook a variety of food types at once whats more the zone temperatures are individually adjustable giving you full control there are also 9 power stages for flexible cooking residual heat indicator for peace of mind about safety this glass hob has a residual heat indicato