The Corning PC-620D stirring hot plate has a 10" x 10" (25.4 x 25.4cm) Pyroceram top and digital temperature and stirring speed displays. It is designed to operate on 120V/60Hz with standard US three-prong plug for use in North America and other areas with similar electrical requirements. 2 year warranty. UL and cUL approved. Microprocessor maintains consistent and repeatable temperature settings from 5°C (if ambient temperature is 0°C or lower) up to 550°C. Digital LED temperature display is adjustable in 5°C increments and blinks until set temperature is reached. Exclusive closed-loop stirring control monitors and regulates the stirring speed from 60-1150 RPM for aqueous, viscous, or semi-solid solutions. Stronger, larger magnet improves stir bar coupling combined with automatic ramp up speed adjustment minimizes decoupling.