What is the actual area that is heated? Is this the Chinese 6" reference design, or something actually newly engineered in a larger size.

Hi Roncalli, In the case of an induction cooktop, an electric current passes through a coil which creates a magnetic field all around and inside the cookware, which directly heat the cookware, and not the cooktop surface. In the same size heated area, the larger the power, the faster the heating speed. If the products need assistance with technical issues, please send the order details to support@empava.com. There is a professional customer service team to follow up. Thanks for checking with us!