Flat, bright white Pyroceram® brand glass ceramic top material is easy to clean, and resists scratches, corrosion, and chemicals. The housing features a spill trough to deflect spills away from the display and control knobs. Electronics are sealed and enclosed to protect against harsh chemicals. An external support rod holder let you mount a thermometer, electrode, or burette. Units automatically adjust to large increases in speed to minimize stir bar decoupling.