Easy-to-clean black ceramic glass surface is resistant to scratching, staining, impact and heat-translucent surface allows you to see the glow of hot elements. High-frequency pulsation elements improve cooking performance and control. Five heating elements with nine zones. Bridge-zone element connects two elements to provide a larger cooking area. Temperature limiter to ensure that safe operating temperature of ceramic glass is never exceeded. Illuminated touch controls with graduated control lighting. True Simmer setting on all elements. Melt setting on one element. Hot-surface indicator light in control panel. Cooktop can be locked so that no elements can be turned on. Turns all elements off. Countdown timer with 1 to 99 minute range and adjustable sound frequency and volume. Easy-to-Clean Black Ceramic Glass Surface: Yes. High-Frequency Pulsation Elements: Yes. Heating Elements: 5 with 9 Zones. Illuminated Touch Controls: Yes with Graduated Control Lighting. True Simmer Setting: On All Elements. Melt Setting: On One Element. Hot-Surface Indicator Light: Yes. Countdown Timer: Yes (1 to 99 Minute Range). Adjustable Sound Frequency and Volume: Yes. Electrical Requirements: 240 V AC, 60 Hz, 50 Amp; 208 V AC, 60 Hz, 40 Amp. Heating Element Outer Diameter: 12″, 9″, 8″ and 6 1/2″. Bridge Element Dimensions: 8″ x 17″. Overall Height: 3 3/4. Recommended Cabinet Width: 39. Minimum Cabinet Width: 36. Minimum Cabinet Depth: 22 3/4. Minimum Height Clearance: 4. Countertop Cut-Out Width: 34 3/8. Countertop Cut-Out Depth: 19 1/4. Minimum 5 3/4 clearance is required between countertop and any combustible surface directly below the cooktop.