AMZCHEF 24 Inch Bulit-in Electric Cooktop. Power Source: Corded Electric. Special Feature: Knob control. Heater Surface Material: Glass Ceramic. AMZCHEF 24 Inch Bulit-in Electric Cooktop, 240/6400W 11 Power Levels Ceramic Electric Stove with Knob Control, Residual Heat Indicator. What’s in the box. 4 Burners Electric Ceramic Cooktop.